Weems and Plath Endurance II 135 Barometer/Thermometer - Manual (Page 8)

All radio stations on ships using 2182 kHz used to be required to maintain
a strictly enforced three minute silence and listening period twice each hour,
starting at h+00, h+30 as shown on the dial in red and green segments. This
allowed stations with distress, urgent or safety traffic information an
opportunity to be heard even if they were at some distance from other
stations operating on reduced battery power or reduced antenna efficiency.
V. Time & Tide Instructions
To Set Time:
1) Turn the fastener of the hinged bezel counter-clockwise to release and open.
2) Insert AA alkaline or lithium battery in back of movement. Follow
diagram on battery housing to make certain the battery is not put in backwards.
Use only alkaline or lithium batteries as they have longer life and are less
prone to leak.*
3) To advance hour and minute hands, turn the smaller of the two gear
wheels on the back of the movement counter-clockwise. To reverse, turn clockwise.
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