What was the longest a World War II submarine stayed at sea without being resupplied at a port?

How long could a ww2 submarine stay out at sea?

Two 126-cell battery groups gave her a submerged top speed of 8.75 knots (16.2 km/hr); holding her speed to 2 knots (4 km/hr), she could remain submerged for 48 hours.

How long did German U-boats stay at sea?

Due to fresh food becoming spoilt from exposure to diesel fumes and being stored in a damp environment, the crew could only store canned goods. The long war cruises – which could last up to six months – took a large psychological toll on many of the crew members.

How many U-boats have not been found?

Despite their prevalence during World War I and World War II, only four U-boats remain intact today.

How long is a ww2 submarine?

They had a length of about 225 feet, beam of 20 feet, and draft of 15 feet. They were of single hull construction, with surface displacement of about 850 tons, and submerged displacement of 1100 tons. They had four or five 21″ torpedo tubes in the bow, and could carry 12 Mk. 10 steam torpedoes.

What is the longest a submarine has stayed submerged?

111 days

The longest submerged and unsupported patrol made public is 111 days (57,085 km 30,804 nautical miles) by HM Submarine Warspite (Cdr J. G. F. Cooke RN) in the South Atlantic from 25 November 1982 to 15 March 1983.

How long can a Russian submarine stay underwater?

The United States, Russia, China, Britain, and France all have fleets of submarines that carry nuclear missiles. The most advanced of these subs are nearly undetectable and can stay submerged for months. A U.S. Trident nuclear submarine carries 24 missiles, each fitted with several independently targeted warheads.

What was the last U-boat sunk in ww2?


U-853 was one of the last U-boats sunk during World War II and the last to be sunk in US waters. (U-881 was sunk the same day in the North Atlantic.) Atherton and Moberly received joint credit for the kill.

How close did the German U-boats get to Canada?

“The closest they got to what you could call the Canadian heartland is within 172 miles of Quebec City in the St. Lawrence River,” he said. The farthest-inland U-Boat, thus, would have come roughly within sight of Baie-Comeau just as a young Brian Mulroney was taking his first steps.

How deep could a ww2 U-boat dive?

German submarine U-352

Nazi Germany
Range 8,500 nmi (15,700 km; 9,800 mi) at 10 knots (19 km/h; 12 mph) surfaced 80 nmi (150 km; 92 mi) at 4 knots (7.4 km/h; 4.6 mph) submerged
Test depth 230 m (750 ft) Crush depth: 250–295 m (820–968 ft)
Complement 4 officers, 40–56 enlisted

How long can a submarine stay out at sea?

three months

Submarines generally stock a 90-day supply of food, so they can spend three months underwater. The diesel-powered submarines (not now used by the United States Navy) had a limit of several days submerged.

How long do submarines stay out?

The Submarine Force is often called “The Silent Service” because of how it operates. Submarines can submerge more than 600 feet below the ocean’s surface for up to four months at a time, constantly patrolling and working classified missions.

How far could a ww2 submarine go?

On the surface, powered by four diesel engines, the Balao had a top speed just over 20 knots (37 km/hr); cruising at 10 knots (18 km/hr) her range was 11,000 nautical miles (20,000 km).

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