Rule 20. NAVAL UNITS

20. NAVAL UNITS 20.1 OVERVIEW
20.2 FLEETS
20.3 FAST CARRIERS
20.4 ESCORT CARRIERS (CVEs)
20.5 EFFECTS OF ATTACKS ON NAVAL UNITS
20.6 TRANSPORTS
20.7 SUBMARINES
20.8 ASW
20.9 PARTIAL NAVAL COUNTERS

20.1 OVERVIEW:
20.11 The following naval units are represented in the game:
20.111 FLEETS:
A. Destroyers (DDs).
B. Cruisers (CAs).
C. Capital ships (non-carrier named ships).
20.112 FAST CARRIERS:
A. Light carriers (CVLs).
B. Fleet carriers (CVs).
C. Super carriers (CVBs).
20.113 ESCORT CARRIERS (CVEs)
20.114 TRANSPORTS
20.115 SUBMARINES
20.116 ASW
20.12 DISTINGUISHING FEATURES: Naval units are distinguished from one another by where they may base; what operations they may carry out; the time, shipbuilding points and BRP cost of construction and repair; and certain other unique abilities.
A. LIGHT SHIPS: Destroyers, cruisers, transports and CVEs are light ships.
B. HEAVY SHIPS: Capital ships and fast carriers are heavy ships.
20.121 SPEED: Naval units fall into two categories, “slow” and “fast”, as follows:
A. All damaged ships are slow.
B. CVEs are slow.
C. Capital ships with an orange stripe on their counter are slow.
D. Transports are slow.
E. Any naval unit in a TF or combat group to which cargo has been assigned (21.35) is slow.
F. All other naval units are fast.

All undamaged German and Italian capital ships are fast. Japan and France have a handful of slow battleships, while most of the starting British and American capital ships are slow.

20.13 Fleets, carriers, submarines, ASW and transports are naval units. Submarines, ASW and transports are also SW units.
20.14 For basing, naval construction, and other purposes associated with the size of naval forces, fleet, carrier, ASW, transport and submarine factors are equivalent.
20.15 BASING: Naval units must base in ports, in hexes containing port counters or in mapboard boxes. Each port may base 50 naval factors. A hex containing two ports may therefore base 100 naval factors. Each port counter may base 50 naval factors. There is no limit to the number of naval factors which may base in a mapboard box (5). Naval units may also be placed in SW boxes. See 21.1 for details of naval basing.
20.16 TFs

20.161 Each major power is provided with TF counters as follows: Germany: 4; Italy: 4; Japan: 12; Britain: 12; France: 4; U.S.: 12; Russia: 3; China: none. The number of TF counters may not be expanded by production.
20.162 A TF marker, if available, may be placed on the board to represent a naval force, subject to the following:
A. A TF must consist of no fewer than 10 naval factors and no more than 25 naval factors (EXCEPTION: Japan’s Pearl Harbor strike force - 51.12).
B. A TF may not contain damaged naval units, submarines, ASW or transports.
C. All naval units in a TF must belong to the same alliance faction. The nationality of the largest component of a naval force determines the nationality of the TF marker used. A TF marker of the senior alliance partner is used if two major powers have an equal number of naval factors in a naval force; a major power TF marker is used if a major power and a minor ally both have naval factors in a naval force.
D. A TF may not contain both inverted and uninverted naval units. TFs which consist of inverted naval units are indicated by inverting the TF counter.
E. Until the end of the redeployment phase, TFs belonging to the moving player may not contain both inverted naval units which were inverted at the start of the moving player’s turn and inverted naval units which were inverted in the course of play during the moving player’s turn because they carried out a mission or activity.
F. For each fast carrier factor in a TF, that TF must also contain at least one fleet factor (EXCEPTION: Japan’s Pearl Harbor strike force - 51.12).

The effect of 20.162F is that no more than half (rounded down) of the naval factors in a TF may be fast carriers, and a TF may never contain more than 12 fast carrier factors (as the maximum size of a TF is 25 naval factors).

20.163 A naval force retains its TF status while at sea even if combat losses result in it no longer meeting the conditions necessary to be a TF. When the naval force returns to port, its TF marker would be removed unless the port contained other naval units sufficient to bring the depleted TF up to the required strength.
20.164 FORMATION AND CONCEALMENT:
A. The composition of TFs is concealed from the opponent. When a TF marker is placed on the board, the naval units, including carrier-based naval air units, but not transporting, invading or redeploying ground or air units, are removed from the board and placed on the owning player’s Naval Status Board, hidden from the opposing player.
B. TF markers may be used at the start of a game to conceal the initial placement of naval units.
C. The transfer of naval units between TFs must be announced to the opponent unless both TFs are based in the same port or mapboard box. The type and identity of transferred naval units must also be revealed unless they are concealed by a new TF marker. Naval units may not be transferred between TFs at sea unless they first combine during fleet combat (22.423B).
D. If part of a TF intercepts a naval activity, at least one portion of the TF must be revealed unless another TF marker is available and both portions may be constituted as a new TF.
E. A TF may not merge with other naval forces while carrying out a naval activity, even if the TF and the other naval forces are carrying out the same naval activity and the TF passes through a port containing the other naval forces or enters the same hex as the other naval forces while both are en route to or in the activity hex. However, naval forces consisting of less than ten naval factors of the same alliance faction which engage in the same naval activity must, if legally able to do so (20.162), combine into a TF if one naval force passes through a port containing the other or if they enter the same hex en route to or in their activity hex and, in so doing, create a naval force consisting of ten or more naval factors (21.312). TFs may merge if they first combine during fleet combat (22.423B).
F. The placement of newly constructed naval units must be revealed to the opponent before a TF marker is placed on the board to conceal them.
20.165 Naval units in an SW box which undertake specific tasks, such as protecting a sea supply line or a sea escort, must break into separate TFs or reveal their strength to the opponent.
20.166 Subject to port capacity restrictions, two or more TFs may base in the same port.
20.167 WESTERN ALLIED NAVAL STRENGTH IN EACH THEATER: Despite the use of TF counters to conceal naval units, the Western Allies must reveal to their opponents, on request, the number and types of naval units available for use in each theater. This reflects the ability of Axis intelligence to determine the general allocation of Western Allied naval resources, although not their specific location.

This is a rare instance where the game relies on the common sense of players to avoid abuse. Normally the Axis will be most interested in the disposition of Western Allied destroyers (as this relates to their invasion capabilities) and fast carriers. The Axis player is not entitled to a detailed census every turn, nor should the Allied player stand on ceremony and insist on a specific request from his opponent every turn.

20.17 RANGE: Naval operations are subject to various range restrictions as set out in 21.36. Naval interception depends on a dice roll (22.21).
20.18 PERMITTED ACTIVITIES: The activities each type of naval unit may perform are set out below. These are summarized in the Naval Activities Table in the player aids.

20.2 FLEETS:
20.21 FLEETS: The term “fleets” refers to destroyers, cruisers and non-carrier capital ships.
20.22 Fleets are subject to the general rules governing naval units.

20.23 DESTROYERS: Destroyers (DDs) are represented by generic units ranging in denomination from one to ten factors.
20.231 OPERATIONS: Destroyers may conduct the following naval operations:
A. Patrol.
B. Carry sea supply.
C. Protect sea supply.
D. Accompany fast carrier missions.
E. Carry or protect ground or air units during sea transport.
F. Carry or protect ground units during seaborne invasion.
G. Conduct shore bombardment.
H. Sea escort or protect sea escort.
I. Intercept enemy naval activities.

20.24 CRUISERS: Cruisers (CAs) are represented by generic units having even-numbered denomination only.
20.241 OPERATIONS: Cruisers may conduct the following naval operations:
A. Patrol.
B. Protect sea supply.
C. Accompany fast carrier missions.
D. Protect sea transport.
E. Protect seaborne invasions.
F. Conduct shore bombardment.
G. Raid.
H. Protect sea escort.
I. Intercept enemy naval activities.

Destroyers or cruisers? Cruisers may not carry units or BRPs and have no on-board ASW value, but can raid and are more robust in combat.

20.25 CAPITAL SHIPS: Capital ships are represented by named ship counters with values of two, three, four and five factors. Depending on the nationality, these are represented as pocket battleships (PBs), battlecruisers (BCs) or battleships (BBs).
20.251 OPERATIONS: Capital ships may conduct the following naval operations:
A. Patrol.
B. Protect sea supply.
C. Accompany fast carrier missions.
D. Protect sea transport.
E. Protect seaborne invasions.
F. Conduct shore bombardment.
G. Raid.
H. Protect sea escort.
I. Intercept enemy naval activities.
20.252 SLOW SHIPS: Slow ships may not raid (21.532A) and roll one fewer die when intercepting or counter-intercepting enemy naval activities (22.232A). Slow ships are identified by an orange band across their counter.
20.253 FIVE-FACTOR BATTLESHIPS: Five-factor battleships have an additional +1 Fleet Nationality DRM (22.552A). For each five-factor battleship in an attacked naval force, the defender’s air defense level is increased by one (23.42).

20.3 FAST CARRIERS:

20.31 FAST CARRIERS: Fast carriers are represented by named ship counters with values of two (CVLs), three (CVs) and four (CVBs) factors. Fast carriers are identified by a yellow band across their counter.
20.32 OPERATIONS: Fast carriers and their naval air units may conduct the following air and naval operations:
A. Patrol.
B. Protect sea supply.
C. Counterair.
D. Attack naval units and bases.
E. Protect sea transport.
F. Protect seaborne invasion.
G. Protect fleets conducting shore bombardment.
H. Provide ground support.
I. Intercept enemy defensive air support.
J. Raid.
K. Protect sea escort.
L. Intercept enemy naval activities.
20.33 FULLY OPERATIONAL FAST CARRIERS: A fast carrier is considered to be “fully operational” if it is undamaged and carrying its full complement of NAS. A fast carrier must be fully operational to modify naval interceptions (22.232A) and submarine defense (22.9413). A fast carrier need not have its full complement of NAS, or even any NAS, to participate in 20.32 operations, although obviously the functions of an empty fast carrier are limited.
20.34 The construction of fast carriers has no effect on the constructing major power’s naval air force pool or naval air training rate.
20.35 Fast carriers have no effect on SW (25.362).
20.36 CVBs: Four-factor fast carriers (CVBs) have a Fleet Nationality DRM one greater than other Japanese and American fast carriers (22.552A). For each CVB in an attacked naval force, the defender’s air defense level is increased by one (23.42).

20.4 ESCORT CARRIERS (CVEs):

20.41 ESCORT CARRIERS (CVEs): Escort carriers are represented by generic units of various denominations. Escort carriers are identified by a purple band across their counter.
20.42 OPERATIONS: CVEs may conduct the following naval operations:
A. Protect sea supply.
B. Protect sea transport.
C. Accompany seaborne invasions.
D. Accompany shore bombardment missions.
E. Provide ground support for seaborne invasions.
F. Protect sea escort.
G. Carry out ASW duties in the SW box.
20.43 CVE CONSTRUCTION: Only the U.S. may build CVEs. See 27.7223 for restrictions on CVE construction.

Escort carriers are worth building! They may not raid, patrol, or intercept enemy naval activities, and their air may not counterair or intercept defensive air support. However, they can assist in finding raiders, shift the submarine warfare modifier, may later be withdrawn if no longer needed (unlike ASW) and have an enhanced air defense value.

20.44 ESCORT CARRIER AIR:
20.441 The construction of CVEs is limited by, but does not count against, the naval air training limit (17.353 ) of the owning major power in the turn in which the CVE is laid down. British CVEs may only be built by the U.S. (27.7223B). The air component of a CVE is not considered to be part of the owning major power’s naval air force pool and is not represented by a unit counter.
20.442 CVEs are limited to providing ground support for seaborne invasions and may perform no other air activities. A CVE must be in an invasion hex to provide ground support. Each CVE factor which provides ground support adds one factor to the ground attack (18.553). The defensive value of a CVE’s air component is abstractly represented by the air defense value of the CVE itself.
20.443 CVEs which provide ground support for seaborne invasions may be eliminated as a result of ground combat in the same manner as other units.
20.45 CVEs IN FLEET COMBAT: CVEs participate in naval combat by engaging in fleet combat as light ships (22.53) .

20.5 EFFECTS OF ATTACKS ON NAVAL UNITS:
20.51 AIR ATTACK AND FLEET COMBAT TABLES: Air attacks and fleet combat effects against naval units are resolved using the Naval Attack Table. A dice roll of less than two is treated as a two.

Naval Attack Table - 20.51, 22.55, 23.44
AS	FF	Dice Roll
AS	FF	2	3	4	5	6	7	8	9	10	11	12+
1	1-2	0	0	0	0	1	1	1	1	2	2	2
-	3-4	0	0	0	1	1	1	1	2	2	2	3
2	5-6	0	0	1	1	1	1	2	2	2	3	3
3	7-9	1	1	1	1	2	2	2	3	3	3	4
4	10-12	1	1	2	2	2	3	3	3	4	4	5
5	13-15	2	2	2	3	3	3	4	4	5	5	6
6	16-18	2	2	3	3	3	4	4	5	5	6	6
7	19-21	2	3	3	3	4	4	5	5	6	6	7
8	22-24	3	3	3	4	4	5	5	6	6	7	7
9	25-27	3	3	4	4	5	5	6	6	7	7	8
10	28-30	3	4	4	5	5	6	6	7	7	8	8
11	31-33	4	4	5	5	6	6	7	7	8	8	9
12	34-36	4	5	5	6	6	7	7	8	8	9	9
13	37-39	5	5	6	6	7	7	8	8	9	9	10
14	40-42	5	6	6	7	7	8	8	9	9	10	10
15	43-45	6	6	7	7	8	8	9	9	10	10	11
16	46-48	6	7	7	8	8	9	9	10	10	11	11
17	49-51	7	7	8	8	9	9	10	10	11	11	12
18	52-54	7	8	8	9	9	10	10	11	11	12	12
19	55-57	8	8	9	9	10	10	11	11	12	12	13
20	58-60	8	9	9	10	10	11	11	12	12	13	13
Modifiers - Air Attacks on Naval Units +# attacker’s Air Nationality DRM -# defender's Naval Nationality DRM +1 if the attacker achieves a surprise level of 3 or greater
Modifiers - Fleet Attacks on Naval Units +/-# Naval Nationality DRMs (22.552A) +/-1 If one of the combat groups involved is carrying out a naval activity which reduces its effectiveness (22.552B)
If more than 20 air squadrons engage in combat, the result is deter-mined by consulting the "20" row and whatever other row is required to equal the total number of air squadrons engaged. If more than 60 fleet factors engage in combat, the result is determined by consulting the "58-60" row and whatever other row is required to equal the total number of fleet factors engaged.
Results Named ships and cruisers: A named ship or cruiser is damaged if it incurs a naval attack effect one less than its size in factors and is sunk if it incurs a naval attack effect equal to or greater than its size in factors. Cruiser groups: If a group of light ships consisting only of cruisers incurs an odd number of hits, the odd hit damages one cruiser. One-factor naval units: If a group of ships consists only of destroyers, CVEs, transports or a combination of the three, each hit sinks a destroyer, CVE, or transport factor. Mixed light forces: Naval attack effects incurred by a light force consisting of both cruisers and one-factor naval units are distributed evenly between the cruisers and one-factor naval units, subject to the proviso that the number of one-factor ship factors sunk may not exceed the number of cruiser factors sunk until all the cruisers in the force are sunk (20.551).

20.511 TREATMENT OF DIFFERENT NAVAL UNITS: Named ships are damaged or sunk as complete units. Cruisers are damaged or sunk in two-factor increments. Destroyers, CVEs, submarines and ASW are sunk as individual factors and may not be damaged. Transports are damaged (during SW only) or sunk as individual factors.
20.512 ACCUMULATING HITS:
A. DURING NAVAL COMBAT: During naval combat, combat effects on named ships accumulate during and between rounds. Combat results which are insufficient to damage or sink a named ship are repaired at sea after all naval combat in the hex has been resolved, before the named ship leaves the hex in which the naval combat took place.
B. OUTSIDE NAVAL COMBAT: Outside naval combat, combat effects from air and submarine attacks on named ships which are insufficient to damage or sink a named ship are repaired at sea after all air and submarine attacks in a hex have been resolved, before the named ship leaves the hex in which the air and submarine attacks took place.
C. RAIDERS: Combat effects on named ships accumulate during the first and second raider engagements (21.5341, 21.538), but do not carry over from the first engagement to the second. Combat results which are insufficient to damage or sink a named ship are repaired at sea as soon as each engagement ends.
D. MURMANSK CONVOYS: Combat effects accumulate when Murmansk convoys are resolved as naval combat (20.512A); but otherwise are repaired at sea after each round of air or submarine attacks (20.512B).
E. SHIPS IN PORT: Combat effects from air and harbor attacks against named ships in port which are insufficient to damage or sink a named ship are repaired immediately and have no effect.
20.513 DAMAGE:
A. NAMED SHIPS: A named ship is damaged if it incurs a naval attack effect one less than its size in factors.
B. CRUISERS: A two-factor cruiser unit is damaged if it incurs one hit.
C. SUBSEQUENT DAMAGE: A damaged naval unit which is damaged again is sunk (EXCEPTION: While combat effects are being accumulated, only one additional hit is required to sink a damaged ship).
20.52 NAMED SHIPS:
20.521 ACCUMULATING HITS: Hits on named ships accumulate as set out in 20.512. Unless a heavy ship is damaged or sunk, the only effect of such hits is to make the ship easier to damage or sink should it incur additional hits while results are being accumulated; the named ship’s speed, firepower, or air carrying capability are unaffected.
20.522 DAMAGE: A named ship is damaged if it incurs a naval attack effect one less than its size in factors. A damaged named ship which is damaged again is sunk (EXCEPTION: While combat effects are being accumulated, only one additional hit is required to sink a damaged ship).
20.523 SINKING NAMED SHIPS: A named ship is sunk if it incurs a naval attack effect equal to or greater than its size in factors.
20.524 SUNK IN PORT: When a named ship is sunk while in port, a critical hit roll (20.525) is immediately made for that ship. If the ship survives, it may be repaired (27.7262). If, prior to being repaired, a ship sunk in port is damaged again or if its hex is occupied by enemy units, it is eliminated.
20.525 CRITICAL HITS: In the following circumstances, one die is rolled to determine if a critical hit occurs on a named ship. If the modified die roll exceeds the size of the named ship, it incurs a critical hit. Critical hit rolls are made when:
A. A NATURAL “12” IS ROLLED: Whenever a “12” is rolled for an air, fleet combat or submarine attack against a named ship, regardless of modifiers and whether or not the named ship was damaged.

Before there is a chance at a critical hit, double sixes must be rolled. An “11” result with a +1 modifier is insufficient. Negative modifiers to a “12” dice roll are disregarded.

B. SUNK IN PORT: A named ship is sunk while in port (20.524).
C. “7+” SURPRISE LEVEL: A named ship is damaged by air attack when a “7+” surprise level is in effect (22.463).
D. DAMAGED AT PEARL HARBOR: An American named ship at Pearl Harbor is damaged or sunk by Japanese air attack, provided Japan achieved a surprise result of “7+” (51.31).
E. ATOMIC ATTACKS: A named ship is damaged or sunk by an atomic attack (43.435, 43.442).
20.5251 MODIFIERS: If the attacker inflicts more hits on a named ship than needed to sink a ship in port, a +1 modifier is applied to the critical hit die roll for each excess hit.
20.526 MULTIPLE CRITICAL HITS PROHIBITED: A named ship may be subject to a maximum of one critical hit per attack, even if the attack triggers more than one of the conditions in 20.525.
EXAMPLE: An American battleship sunk in port during Japan’s Pearl Harbor raid with a die roll of “12” is subject to only one critical hit die roll.
20.527 EFFECTS OF CRITICAL HITS: A critical hit has the following effect, in addition to any effect of the combat roll which triggered the critical hit:
A. An undamaged ship is damaged.
B. A damaged ship at sea is sunk.
C. A damaged ship in port is sunk in port.
D. A ship sunk in port is destroyed.
20.528 EXCESS HITS: Excess hits against named ships beyond what is required to destroy the targeted ship are disregarded. Named ships and air units may not inflict damage on other air or naval units during a combat round in which they target a specific named ship.
20.529 NO CRITICAL HITS FOR CRUISERS: Critical hit rolls are never made for cruisers.
20.53 CRUISERS:
20.531 TREATED AS TWO-FACTOR NAMED SHIPS: Each cruiser is treated as a two-factor named ship for the purpose of determining the effects of enemy air and fleet attacks (EXCEPTION: Critical hit rolls are never made for cruisers).
20.532 FORCES CONSISTING ONLY OF CRUISERS: Every two hits sinks a two-factor cruiser. If an odd number of hits is incurred, an additional cruiser is damaged. An odd hit sinks a damaged cruiser only if the naval force in question contains no undamaged cruisers.
20.533 DAMAGE: A two-factor cruiser unit is damaged if it incurs one hit. A damaged cruiser which is damaged again is sunk.
20.54 LIGHT SHIPS:
20.541 TREATED AS SINGLE FACTORS: Destroyers, CVEs, ASW, submarines and transports are sunk as single factors.
20.55 COMBINED LIGHT FORCES:
20.551 CRUISERS AND ONE-FACTOR NAVAL UNITS: Naval attack effects incurred by a light force consisting of both cruisers and one-factor naval units are distributed evenly between the cruisers and one-factor naval units, subject to the proviso that the number of one-factor ship factors sunk may not exceed the number of cruiser factors sunk until all the cruisers in the force are sunk. Thus one hit damages a cruiser; two hits sink a cruiser; three hits sink a cruiser and a one-factor naval unit; four hits sink a cruiser and two one-factor naval units; five hits sink a cruiser and two one-factor naval units and damage a cruiser; six hits sink two cruisers and two one-factor naval units; on so on. If a light force contains undamaged and damaged cruisers, as well as one-factor naval units , naval attack effects applied to the cruisers are first applied to the undamaged cruisers.

In a mixed force, a cruiser is always damaged by the first, fifth, ninth, etc. hit, provided there is still a cruiser to be damaged.

20.552 DIFFERENT TYPES OF ONE-FACTOR NAVAL UNITS: Naval attack effects against different types of one-factor naval units are apportioned between the different types of one-factor naval units as per 20.57.
20.56 EXCESS HITS: If naval attack effects against a force containing cruisers and one-factor naval units exceed the number of defending naval factors, the excess damage is ignored (EXCEPTION: If light ships protecting a sea supply line are all sunk, any excess damage may disrupt the sea supply line - 30.381).
20.57 LOSSES FROM MIXED FORCES: Naval losses from a force of mixed types, such as different nationalities, must be distributed equally among the types involved, with any remnant loss which cannot be divided equally being taken by the type having the most factors involved. If an equal number of factors were involved, the remnant is taken from the type with the lower Naval Nationality DRM. If the number of factors present and the Naval Nationality DRMs are equal, the owner chooses.
20.58 ATTACKS ON DESTROYERS AND TRANSPORTS CARRYING CARGO: Destroyers and transports which are carrying ground units, air units, oil or BRPs during sea transport, seaborne invasion or sea escort may be eliminated by enemy combat results as follows:
A. FLEET COMBAT: Destroyers and transports carrying cargo are automatically screened, and may only be fired upon if all screening ships in their naval force or combat group are eliminated (EXCEPTION: Undamaged cruisers that are damaged by heavy fire are screened and need not be sunk in order to attack screened naval units - 22.54D). Screened light ships are attacked as a group and take losses according to 20.57.
B. AIR AND SUBMARINE ATTACKS: Destroyers and transports carrying cargo may not be screened against air or submarine attacks. They, along with all other light ships in their naval force or combat group, are attacked as a group and take losses according to 20.57.
20.59 EFFECT OF ATTACKS ON CARGO: If, as a result of enemy air, fleet or submarine attack, the number of surviving undamaged destroyers or transports drops below that required to carry a ground or air unit, that unit is eliminated. Where several units are being carried, the defender chooses which ground or air unit(s) to eliminate. Ground or air units may not be eliminated unnecessarily, although the defender may eliminate more factors than required in order to preserve other units of a different type. Similarly, the interception of a BRP grant or oil shipment may result in the loss of some or all of the BRPs or oil counters if the number of surviving transports drops below the required level.

20.6 TRANSPORTS:

20.61 FORCE POOLS: The shipping capacities of the Western Allies and Japan are represented abstractly by the number of transports in their force pools. Britain and the U.S. share a single Western Allied transport force pool.
20.62 CONSTRUCTION: Each transport costs one shipbuilding point and three BRPs to construct. Transports may not be used in the game turn in which they are built.
20.621 AMERICAN SHIPBUILDING: American shipbuilding capacity may be used to construct Western Allied transports prior to American entry into the war against Germany (27.7322).
20.63 LOCATION: Transports normally do not base in ports and are not placed on mapboard hexes like other units. Western Allied transports are placed in the Atlantic, Pacific and Indian Ocean SW boxes; Japanese transports are placed in the Pacific SW box. Transports may enter and remain in eligible ports and mapboard boxes in order to avoid enemy activity in a SW box, but transports may only function if they are in a SW box at the start of their player turn.

Transports are versatile, but whenever they operate they are exposed to enemy attack. For example, if Western Allied transports evacuate the Atlantic SW box in Spring 1941, no Western Allied transport activity in the Atlantic is permitted in Summer 1941. If the Western Allied transports returned to the Atlantic SW box in Summer 1941, they could be used in Fall 1941.

20.631 INITIAL LEVELS: The initial number of transports are:
A. ATLANTIC: 15 Western Allied transports.
B. INDIAN OCEAN: 5 Western Allied transports.
C. PACIFIC: 10 Western Allied transports.
D. AT LARGE: 5 Western Allied transports, to be initially allocated to the Atlantic or Indian Oceans as desired.
E. UNBUILT: 5 Western Allied transports.
F. PACIFIC (JAPAN): 20 Japanese transports.

For the sake of convenience, all Western Allied transports are listed on the British force record sheets.

20.632 RESTRICTIONS:
A. USE: Transports may only be used in the location in which they began the turn.
B. CONSTRUCTION: Newly constructed Western Allied transports may be placed in any eligible location (27.711), even if combat losses have reduced the number of transports in another location below that location’s initial level (20.631).
C. REDEPLOYMENT: After use, Western Allied transports may be redeployed from one location to another during the redeployment phase. Only transports in excess of a location’s initial level may be redeployed, and a redeployment may not reduce the number of transports in a location below its initial level. A player may not voluntarily eliminate transports in order to rebuild them elsewhere. Transports may be redeployed in the turn they are constructed. Transports that are used and then redeployed may be used in their new location in the following player turn.
20.6321 REDEPLOYMENT TO AND FROM PORT: Western Allied transports may redeploy from a mapboard box to avoid enemy SW in the following turn, and may not be intercepted as they do so or as they return to an SW box. Japanese transports may similarly redeploy to a port, but may be intercepted in their port hex as they do so or as they return to an SW box.
20.633 PENALTY FOR DROPPING BELOW OPTIMAL LEVELS: A penalty of one BRP is incurred each turn for each transport below the following optimal transport levels in each SW box, subject to the qualifications set out below.
A. The number of undamaged transports in each SW box is determined at the start of the affected major power’s player turn. Damaged transports which were forced to leave an SW box by enemy action (24.632A) are not counted towards the optimal transport level.
B. The BRP penalty for a single turn may not exceed the optimal transport level for the SW box in question.
C. There is no BRP penalty for Atlantic and Indian Ocean transport shortages if Britain has surrendered and is not at war with Germany.
D. Transports counted toward optimal levels may also be used for other purposes.
20.6331 The optimal levels are:
A. ATLANTIC AND INDIAN OCEAN (Western Allies): 30 Western Allied transports total. BRP penalties for Atlantic and Indian Ocean transport shortages are incurred by Britain (EXCEPTION: BRP penalties for Atlantic and Indian Ocean transport shortages are incurred by the U.S. if Axis control of all ports in Britain and Ulster prevents American BRP grants to Britain).
B. PACIFIC (Western Allies): 10 Western Allied transports. BRP penalties for Pacific transport shortages are incurred by the U.S.
C. PACIFIC (Japan): 15 Japanese transports. If Japan does not trace a sea supply line from Japan to a port in French Indochina, Thailand or Singapore once it is at war with Britain, it loses 15 BRPs, regardless of the number of Japanese transports in the Pacific SW box.
20.6332 EFFECT ON BRITISH AND JAPANESE CONSTRUCTION LIMITS: BRP losses from transport shortages reduce the British and Japanese construction limits (27.331).
20.64 FUNCTIONS: Each undamaged transport factor which begins its player turn in an SW box (20.63) may be used once per turn for one of the following naval activities:
A. OIL SHIPMENTS: To ship one Western Allied or Japanese oil counter. The owning player may assign transports to sea escort oil counters (30.4). The number of transports which may be assigned to carry oil each turn is limited by the number of transports available in the Atlantic, Pacific and Indian Ocean SW boxes, as the case may be: 1 transport: 1 oil counter; 2 transports: 2 oil counters, 3-9 transports: 3 oil counters; 10-12 transports: 4 oil counters; 13-15 transports: 5 oil counters; 16 or more transports: 6 oil counters; and so on. See 33.4523 and 33.473.
B. SEA SUPPLY FROM MAPBOARD BOXES: Western Allied transports must be used to provide sea supply from mapboard boxes (30.365). Each such sea supply line requires one transport.
C. SEA TRANSPORT, INVASIONS OR NRing UNITS: One transport is required for every five ground or air factors which sea transport (21.434), invade (ground units only; 21.513) or are NRed using transports as sea escort (21.64). Ground and air units may be carried in any combination, but the ground units may not be split between two transports: a transport could carry a 3-4 infantry unit, a replacement and an army air factor, or two 2-5 armor units and three naval air squadrons, but two transports could not be used to carry three 3-4 infantry units.
D. BRP GRANTS BY SEA: One transport is required to sea escort each BRP grant of up to five BRPs by sea, including grants by Murmansk convoy and through Persia, Turkey and Siberia (40.22). Atlantic transports are used for Murmansk convoys and grants to Britain, France or the South Africa box; Indian Ocean transports are used for grants through the South Africa box and Persia or Turkey to Russia or through India to China; Pacific transports are used for Siberian grants, grants to Australia and grants from the Pacific U.S. box to China.
20.65 TRANSPORT PROTECTION: Naval units in an SW box may be assigned to protect transports in that SW box which carry out any of the activities set out in 20.64A-D. If different transports are engaged in the same activity, as would occur when two supply lines are traced from a mapboard box, each naval unit may protect only one transport and is assigned to this function before any enemy attempts to disrupt the activities are made. Otherwise, naval units in an SW box may protect as many different 20.64A-D and 30.361D-F functions as desired in the same turn .
20.66 DAMAGED TRANSPORTS: Once all submarine and raider activity has been resolved, damaged transports leave their SW box and return to port without risk of interception, where they are immediately repaired at no BRP cost. Such transports remain inverted for the remainder of the enemy player turn and the owning major power’s ensuing player turn, and may not carry out any function until the player turn after they are redeployed from port to a SW box.
EXAMPLE: During the Spring 1941 Axis player turn, four Western Allied Atlantic transports are damaged in SW combat. These transports return to port and are immediately repaired at no BRP or shipbuilding cost. These transports may return to the Atlantic SW box during the redeployment phase of the Spring 1941 Allied player turn for use in the Summer 1941 Allied player turn, although they would again be exposed to German submarines and raiders during the Axis Summer 1941 player turn.

20.7 SUBMARINES:

20.71 BASING: Each submarine is equivalent to one fleet factor for basing purposes. In addition to basing at ports or in mapboard boxes:
A. German submarines may operate in the Atlantic SW box.
B. German submarines may operate in the Indian Ocean SW box if the Axis control the Suez canal and Ethiopia.
C. Japanese submarines may operate in the Pacific SW box if Japan and the United States are at war.
D. Japanese submarines may operate in the Indian Ocean SW box if Japan and Britain are at war.
E. American submarines may operate in the Pacific SW box if Japan and the United States are at war .
20.72 Italian and British submarines may not operate in SW boxes. British submarines may not operate in the Pacific theater unless Italy has surrendered.
20.73 TRANSFERS BETWEEN SW BOXES: Submarines may be transferred from one SW box to another during the redeployment phase without impairing the ability of the submarines to conduct submarine warfare in the next player turn.
20.74 RANGE: Submarines based on the board are subject to the same range restrictions and intercept enemy naval missions in the same manner as naval units.
20.75 OPERATIONS: Submarines based on the board may accompany fleets or carriers on any operation or may independently intercept enemy naval activities (22.915). Submarines operating in an SW box may only conduct strategic warfare against enemy transports (25).
20.76 CONSTRUCTION: Each submarine costs three BRPs and one shipbuilding point to build.
20.77 AIR ATTACKS AGAINST SUBMARINES: Submarines may not be attacked by air units while in port or at sea unless they remain in their patrol hex during the opposing player turn ( 21.4184C). Air units assist in defending against submarine attacks (22.9413).
20.78 ADVANCED SUBMARINES: Advanced submarines are identical to conventional submarines, with the following exceptions:
A. PRODUCTION: Advanced submarines may only be built by Germany, and only after a “9” research result for advanced submarines has been achieved by the European Axis (42.23A).
B. SW COMBAT: For SW combat involving German advanced submarines, see 25.75.
C. ON-BOARD ATTACKS: Advanced submarines always make on-board attacks at a net +1 modifier (22.941).
D. HARBOR ATTACKS: Advanced submarines always make harbor attacks at a net +1 modifier.
E. ATOMIC ATTACKS: Advanced submarines may carry atomic weapons.
F. LOSSES: Advanced submarines are a distinct type of naval unit and incur losses in accordance with 20.57.

20.8 ASW:

20.81 BASING: ASW may base in SW boxes, ports or mapboard boxes. ASW may be transferred from one SW box to another during the redeployment phase without impairing the ability of the ASW to oppose submarine warfare in the next enemy player turn.
20.82 RANGE: ASW may engage in SW combat only with submarines in their SW box.
20.83 OPERATIONS: The only operation which may be carried out by ASW is to oppose enemy submarines in their SW box (25) and modify submarine attacks (22.9415).
20.84 CONSTRUCTION: Each ASW costs three BRPs and one shipbuilding point to build.
20.85 FORCE POOLS: Britain and the U.S. share a single Western Allied ASW force pool.

20.9 PARTIAL NAVAL COUNTERS:
20.91 Destroyer, CVE, ASW, submarine and transport counters may be broken down into smaller counters of the same nationality at any time during play, including during an opponent’s player turn. Similarly, smaller counters may be recombined into larger ones at any time. Cruisers are treated in the same manner, using even-numbered denominations only. Named capital ships and fast carriers represent specific ships and may not be broken down or combined.
20.92 A player may begin a scenario with his naval units broken down into partial naval counters if otherwise allowed.
20.93 Although a player may have as many partial naval counters in play as he wishes, cruiser, destroyer, CVE, ASW, submarine and transport counters in the same hex must be combined at the end of their owner’s player turn if the opposing player finds the unnecessary partial naval counters distracting.