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Submarines
Submarines are naval craft that can operate for an extended period of time underwater. They are used primarily as warships, as well as for business, scientific and other purposes. Submarines are different from submersibles, which only have limited underwater capability.
2,056 Questions
How long can a submarine stay underway?
It depends on the propulsion type (Diesel-Electric or Nuclear). DE's are of course limited by fuel replenishment requirements as always, but today's boats are much more efficient than their WWII counterparts, and can typically stay at sea for many weeks.
Nuclear Submarines are a different animal altogether. Were it not for crew needs (food replenishment) and maintenance that can only be done in port, they could stay underway indefinitely until refueling was required, which is typically several years.
Which class of submarine has a mission of strategic deterance?
the SSBN's or balistic missle submarines are on strategic deterrance. the only class of SSBN's the navy currently has is the Ohio class. 726-743.
although the Ohio itself, SSBN 726 is undergoing conversion to SSGN, replacing its balistic missles with guided conventional payload missles.
What does a submarine do that a warship cannot?
1. Both types of vessels can sink; however, only a submarine can return to the surface afterward.
2. One ship is a target; the other is a submarine.
How many submarines were involved in D-Day?
Only a few British submarines were involved landing advance recconnaisance soldiers during the early days of June 1944.
Are you-boats and submarines the same thing?
Yes, but U-boat is confined to German subs. the word is literally Unterseeboot- Undersea Boat, which is what a submarine is.
How many nuclear submarines does the US have?
The current total is 71 active and 2 reserve as of May 2011 -
Commissioned
14 SSBN's (Ballistic Missile Submarines)
4 SSGN's (Cruise Missile Submarines, converted SSBN's)
53 SSN's (Fast-Attack Submarines)
Reserve
2 SSN's (688-class Fast-Attacks)
The USS California, the newest Virginia-class SSN, is scheduled for commissioning in October 2011, with another 4 on the way.
How American submarines were named?
Answer
US submarines were named after fish and sea creatures, the letter starting with the same letter as the class name, for example: Salmon Class, USS Skipjack, Tambor Class, USS Thresher.
Why were submarines so important?
Can't see them. They sneak up on you. When they were first invented 'en mass' in WWI they were considered cowardly by surface naval officers. Akin to shooting a man in the back!
When was the first war submarine made?
The first submarine built for combat was the Turtle (also known as the American Turtle). It was invented by David Bushnell in 1775. It was used in an unsuccessful attack on the HMS Eagle on September 6,1776
What kind of Navigation lights does a submarine have?
Submarines have 5 primary navigation lights, though not all are used on the surface while in open ocean. The 3 primary lights are the Rudder (white light), Port (Red) and Starboard (Green). Additionally, a flashing yellow light is set atop one of the primary masts - this is a known warning to other vessels that the vessel is a Submarine.
The yellow light is used because at night, submarines are nearly impossible to spot; it's even difficult to maintain good orientation if you're topside and on deck at night while underway. Submarines also are much lower in the water than a traditional ship. Since a submarine's hull above the water only represents a fraction of its true size, knowing the vessel is a submarine lets approaching vessels know to steer further clear of the submarine because it is much bigger than is seen. The other lights are traditional.
In port or at anchor offshore, a Bow light on the Bow mast is lit at night - it isn't used while underway.
How many submarines were used in world war 1?
An estimation of about 600 subs were operated during the war.
Who were the survivors of the p514 submarine?
There was only one survivor found belonging to the P514 sub. This person was Norman.C. Bennett from England. He was found dead along the coast of Newfoundland by a local.
What month was the first US submarine built?
Though the first American submarine was the Revolutionary War's Turtle, the U.S. Navy did not exist at that time.
The U.S. Navy's first submarine, the USS Alligator, was built in 1862, and active in the Civil War.
The USS Holland (SS-1), was the U.S. Navy's first commissioned submarine, had her keel officially laid down at Electric Boat in November, 1896. She was commissioned in October 1900.
What is something boats use to locate objects underwater?
The modern tools includes several forms of sonar(detection by sound reflection).
Does Mexico have nuclear submarines?
Yes they do. They've got 3 of those
Ans 2 - The 'Armada de Mexico' has NO submarines of any kind !
Currently they have 1 destroyer, 6 frigates, 2 missile corvettes and a number of patrol boats.
How much of a nuclear submarine is under water when it has surfaced?
Approximately 4/5 or 3/4 of a boat remains underwater while it is on the surface, or around 75-80%.
How does sonar detect direction of underwater objects?
Although bats, dolphins and some blind folks have used an active sonar (SOund Navigation And Ranging) system for many years (they make little squeaks or clicks and listen for the returning echos) The equivalent mechanical electrical system (ASDIC) was developed in the early years of the 20th century. The system uses both the speed of the returning echo and changes in the frequency of the returning sound to detect location, and direction of the detected object
A passive system (just listening) is used by most animals and birds. Leonardo da Vinci proposed a directional listening tube to detect the approach of ships.
In general, only Passive Sonar is primarily used aboard modern submarines due to the noise factor; active pings work both ways for detection much the way tracer bullets do. Passive Sonar can tell you a lot about a target though; bearing (location), type of target (merchant vessel, trawler, warship, submarine, etc.), speed (turncount if it's a surface ship), Angle on the Bow, bearing rate, range (over time after plotting). Active Sonar is only used to verify target range prior to shooting a torpedo.
Passively listening to a target, you can also tell its direction by doppler sound effect, i.e., whether or not it's getting closer or moving away, by volume and frequency pitch. You normally assume that the target is closing on your position; if it wasn't, you wouldn't have detected it.
Is the Alvin submersible still being used?
The U.S. Navy's ALVIN (DSV-2) is still on loan to the Woods Hole Oceanographic institute, and was refitted in 2011. She began shallow diving operations in 2012, and is expected to be back at full depth capability by 2015.
ALVIN is no spring chicken though, and a possible replacement has been in the works for some time. However, given budget constraints, that'll likely get put on the back burner.
What does the captain of a submarine look through?
When at periscope depth, they look through the periscope. It is a prism arrangement that allows good vision around the area. It also provided for gauging distances with a built in range finder.
USA. nuclear powered submarines can go faster than 25 knots (nautical miles per hour) underwater.
Why did Germany attack the US with submarines in World War 1?
They were headed by British shipping ports shipping supplies, Germany was at war with britian.
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What Japanese Carriers were sunk by submarines in World War 2?
There were to be 3 super battleships built in Japan during WW2; Yamato, Musashi, and the Shinino. After the Battle of Midway aircrew losses, the Imperial Navy decided they needed more carriers and NOT more battleships, consequently, they converted the last of the YAMATO class battleships into an aircraft carrier. The largest Aircraft Carrier of WW2, the IJN Shinino, which was built on a YAMATO battleship class hull, was sunk by a USN submarine.
