Technology and Operations  
This forum is for discussing technological & operational matters pertaining to U-boats. 
RE: Type VllC
Posted by: kurt ()
Date: September 19, 2001 02:10AM

I don\'t think anyone answered your specific questions.

-A U-boat used primarily the eyes (with binoculars) of the lookouts - four usually, each watching a specific 90 degree quadrant. In clear weather during the day they could spot a plane miles away and get under in plenty of time - if they were on their toes. If the weather was bad and the plane was radar equipped, chances are that the plane would pop out of the mist and clobber them before they could do anything. At night they would be able to see precious little - and be liable to surprise. Remember that the boats engines usually drowned out the noise of an approaching airplane.

Radar detectors and some radars were used, but these had varying degrees of effectiveness. A boat would dive if the radar detector indicated someone was getting close - same as a lookout spotting a plane.

-A well trained VIIC could go from surface running on diesels to fully submerged at periscope depth in a bit over 30 seconds- maybe 35 - 40 secons being a bit long. A lot depended on the crew\'s training.

-The usual tactic when attacked from the air was to get under as fast as possible, and dive deep as quickly as possible. A sudden turn after submerging to throw off a depth charge drop was common. Given enough warning this was very effective against depth charges, but not against the Fido acoustic homing torpedo. If you were slow in getting under or got surprised at or near the surface the shallow depth charges dropped on you would be lethal.

At one point in the war Doenitz ordered U-boats to stay on the surface and \'fight it out\' with added AA armamament. Losses were horrid - it was an insanely stupid order.

-\'The Swamp\'? new one on me.

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Subject Written By Posted
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RE: How did U-Boats spot planes? oliver 09/11/2001 03:47PM
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RE: Comments kurt 09/17/2001 05:31PM
Re: Comments JAYRSEE 11/28/2001 07:27PM
Re: Comments radar gmansw7 05/20/2016 09:43AM
Re: Comments gmansw7 05/20/2016 09:45AM
RE: U-boats and radar James stewart 09/17/2001 11:10AM
The HF war at sea SuperKraut 09/15/2001 10:56AM
Type VllC Keith Wilkinson 09/17/2001 06:35PM
RE: Type VllC kurt 09/19/2001 02:10AM
SWAMPS Keith Wilkinson 09/19/2001 06:52PM
RE: SWAMPS kurt 09/19/2001 07:51PM
RE: SWAMPS walter M 09/21/2001 08:53AM

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