The drawing for Design 3_/18D drawn for the Baltimore
class heavy cruisers dated December 30, 1943. There were no colors specified for this drawing, except dull black (BK) was labeled on the port and starboard views and ocean gray was labeled on the deck. Measure 32 vertical colors usually would be dull black (BK), ocean gray (5-O) and light gray (5-L) with the horizontal surfaces having a pattern of deck blue (20-B) and ocean gray (5-O).
Design 18D was derived from an earlier pattern suggested in the June 1942 revision to SHIPS-2 to be used with Measure 16 introduced by that document. A Design 18D drawing was attached to the July 15, 1943, memo to PacFleet for the Fletcher class destroyers. The battleship USS North Carolina (BB-55) also wore Design 18D from November 1943 all the way through most of 1944.
Original drawing source: NARA 80-G-109721 and 80-G-109722.