A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Greg Rudzinski
Date: 2017 Jan 3, 20:57 -0800
Can't speak for the US Navy but in the US Merchant Marine prior to Y2K watches were 4 on 8 off. When clocks got advanced 1 hour to the next time zone going East (23 hour day) then evening and early morning watches stood 20 minutes less (3 hr. 40 min.). Going West watches stood 20 extra minutes after clocks were retarded one hour (25 hour day). On ocean going tugs watches were generally 6 on and 6 off. Some ships had clock systems that changed all the clocks onboard at the same time from the bridge. Fast ships in the days of cheap fuel were capable of crossing two time zones in day (SeaLand SL7 Container Ships).