NAVAL SEARCH

+1	per searching group (this modifier always applies at least once).
+1	if any friendly air units are based within range of the coastal hex, or any part of the sea area*, containing the enemy naval units.
+2	if the interception attempt takes place in a coastal hex (light blue), not a sea area.
-2	if W weather conditions exist in the space.
+1	if the interception attempt is being made by an SS (submarine) unit.
-1	if the target of the interception is an enemy SS (submarine) unit.
+	modifiers appropriate to the sea area being searched.

*The air units do not have to be able to reach the hex occupied by the enemy naval units in the area; simply having at least one hex of an area in range of friendly air units (and weather condition that allows flying) grants this modifier. This does not allow air units to attack naval units they cannot reach – but it does narrow down the area that must be searched.

U-BOAT HITS

-1	per damaged U-boat that attacked sucessfully.
-1	per U-boat that sucessfully attacked the South Atlantic route.
+1	per U-boat that sucessfully attacked the U.S. coast route.
+1	per sucessful attack by a U-boat in a severe weather zone during W weather (North Atlantic, Arctic, and U.S coast routes are in the severe weather zone).

MOVEMENT TO CONVOY ESCORT BOXES

Units can move to escort	From these ports
North Atlantic route	Any except tose within Mediterranean, Red or Black Seas
South Atlantic route	Capetown, Casablanca, Gibraltar
U.S. Coast route	U.S. box, Canada box
Arctic route	U.K., Norway, Murmansk, Archangel