early on the morning of 13 february 1956, "brough" sailed with escort squadron fourteen for key west, florida. from 20 february until 30 march "brough" again provided services for fleet sonar school. afterwards "brough" engaged in type training out of newport during april and participated in exercises convex and hourglass under commander antisubmarine atlantic during may and june. after three weeks of upkeep the ship departed for a six-week restricted availability at portsmouth, new hampshire to prepare for operation deepfreeze ii. prior to lieutenant commander w. p. duhon of new orleans, louisiana, relieving lieutenant commander lockee, "brough" received the battle efficiency "e" plaque. the change of command took place on 23 august 1956.