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Old 10-14-08, 01:03 PM   #11
doulos05
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Quote:
Originally Posted by gAiNiAc
Just an FYI.........

I've never read anywhere that US subs had standing orders to submerge at dawn and surface at dusk.

US subs transitted on the surface to and from patrol areas.
The war reports I have read specifically mention thinks like:

1115: SD Radar reports aerial contact, dove to periscope depth
1130: Surfaced
1213: Airplane spotted, identified as Betty. Dove to 120 ft. Splashes heard, no damage
1230: Surfaced
1243: Airplane Spotted. Dove to periscope depth. In order to reduce crew fatigue, we will spend the remainder of the day submerged. Made rotations for 3 knots.

That seems to indicate that, regardless of standard doctrine, US Sub skippers did run their boats on the surface during the day. Given the presence of SD radar, there's really no reason not to, since you will detect the plane 15-20 nm or more from your position, giving you plenty of time to go as deep as you like. While under a lot of air traffic, they probably would have run submerged during the day, I'd think they spent as long as possible on the surface making 9.5 knots.
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