Submarines

Compressed air is one of the most vital resources needed by all submarines and submersibles alike. Compressed, high-pressure air is used in everything from weapon ejection to emergency systems. Some key uses are:

1. Torpedo / Missile Systems

2. Emergency Air Breathing System

3. Internal Salvage Air (used if there's flooding in a compartment to pressurize it and slow down flooding)

4. Main Ballast Tank Emergency Blow

5. Emergency Evacuation or SEAL/Diver Lockout (Escape Trunks)

Yes, when a submarine boat pumps water out of its flotation (not floatation) tanks, the submarine should rise.

It is simply the hull number assigned to the ship. There are typical a number of ships in a series or type and they are numbered sequentially. It is not an indication of how many ships there are total.

Submarines don't have a sickbay per se (i.e., a medical ward) since there aren't any doctors aboard. Essentially, the ship's Corpsman (usually a First Class or Chief Petty Officer), works out of a small equipment space (still called sickbay though) that's not much bigger than a closet. In general, it's located either adjacent to or near the ship's mess deck. This is due to the fact that for emergency surgery, the wardroom table can be converted to an operating table, and during a shipwide casualty with major injuries, the mess hall can be converted to a first aid/casualty station. The mess deck is also usually centrally located in the forward section of the boat.

A TRIDENT Submarine most likely refers to the US Navy's OHIO Class Submarines (18 of these were built) They often bear the name of TRIDENT because they were designed to carry Trident Missiles - a submarine launched intercontinental ballistic missile with nuclear warheads.

The flow of war material to France by way of Britain was preventing the German army from gaining an advantage in the fighting. Germany hoped to stop the resupply of the Allies, especially from the United States, and also to deter and demoralize the British, who were resisting them the most successfully in France. The Germans also hoped to relax the British naval blockade of German shipping.

Ohio class submarines carry 24 Trident missiles.

At very low depths, water pressure becomes exceedingly high. If a submarine submerges below it's depth tolerance, the water pressure outside will exceed the limits of the pressure hull which maintains a normal air pressure for the crew. This will collapse the hull. This is referred to an implosion because the destruction comes from the outside in a crushing manner.

You do not specify a model, so I have to guess. The two most common places are a thumbwheel on the cable somewhere on the handle and a knob at the rear of the cover over the belt. Either way it is clockwise to apply more tension.

There are no known submarines named Juliet. However, the name Juliet is used by NATO to identify a class of Soviet submarines that are no longer in operation. It was a diesel-electric submarine capable of launching cruise missiles. Most American World War II submarines were named after species of fish. Most early nuclear-powered submarines were named after World War II submarines. The first generation of nuclear-powered ballistic submarines were named after famous Americans. Most Los Ageles-class fast attack submarines are named after U.S. cities, with the exception of the USS Hyman G. Rickover. Most Ohio-class guided missle and ballistic missile submarines are named after U.S. states, with the USS Henry M. Jackson being the exception. The Virginia-class fast attack submarines are mostly named after U.S. states. The lone exception as of January 2011 is the John Warner, which is expected to be delivered in 2015.

yes and they were used frequently Yes. There are some examples on public display. One is located next to the battleship USS Alabama at Mobile, AL.

The reason for the teardrop hull shape (aeronautical engineers developed it first - naval engineers followed suit later) is that it is extremely strong, yet streamlined enough to allow for the least resistance while traveling through their respective mediums (air and water).

Both use similar methods of control - each have a primary means of altitude/depth control (fairwater/bow planes, wing flaps), trim control (trim planes, tail flaps), and directional control (rudder).

The change to the TD hull design came with the advent of nuclear powered submarines. With increased power comes increased speed potential, and naval engineers searched for a design that would allow them greater speeds underwater. Previous boats had better speed on the surface, since they were essentially surface ships with limited submergence capability. With nuclear power, true submersibles could be built, and submerged speed was paramount. Today's submarines can go 3 times faster underwater than they can surfaced due to their hull designs.

The Bell X-1 rocket plane, which was used by Chuck Yeager to break the sound barrier in 1947, is based on a .50 caliber bullet shape, which was known by engineers of the day to be capable of breaking the barrier. All designs since then have been based on a streamlined shape.

The TD shape is also somewhat spherical in design, and as such provides for much greater strength under pressure at deeper depths. More recent designs (Seawolf, Virginia classes) have gone to a more cigar-shaped hull, which gives it even better strength at depth.

A propeller on a submarine (which is called a screw, by the way) works to convert the rotational energy of the shaft into propulsion.

The screw is a hydrofoil with blades attached to a heavy central hub or boss. The blades are inclined to the plane of rotation. For forward motion, the screw rotates in a given direction, and the leading edge of the screw "bites" into the water ahead of the plane of rotation. This has the effect of pushing water backwards. The rest of the blade follows along and continues to push the water backward. When water is forced back, the submarine is forced forward, and this is a play out of the action-reaction chapter in a physics book.

A link can be found below for more information, and you can see a diagram or two, which will help greatly.

Germany called there submarines U boats

A submarine, theoretically, can go as long as the food for its sailors last. A submarine can make oxygen, distill water, remove CO2 and other pollutants, and provide almost anything needed to survive at sea and underwater for nearly an indefinite period of time. Modern nuclear-powered submarines' reactors will last without refueling for the life of the submarine - about 20 years. In 1960, the nuclear-powered submarine USS Triton circumnavigated the globe submerged.

Most submarines now have a single nuclear reactor. Some smaller, coastal submarines have a single diesel.

Warships traveled with Merchant ships for protection.

The Electrical Officer reports to the Chief Engineer. They are responsible for the electrical systems of the submarine. That will include the power supplies, batteries, and internal communications.

The proper submarine/naval term is the Helmsman, who controls the rudder and dive planes.

The Conn Officer will first order the boat to be Rigged for Dive. Upon getting a green board on the Ballast Control Panel (BCP) indicating all major hull openings are shut (red indicator means open), and reports from all stations that the boat is Rigged for Dive, he'll order the Diving Officer to dive the boat.

The Diving Officer will then order the Chief of the Watch (the BCP operator) to submerge the ship and announce it; the Chief of the Watch, on the will announce "DIVE, DIVE' on the 1MC (general announcement circuit). The boat will then submerge to Periscope Depth as the ballast tank vents are opened.

Prior to 1920, the USN used the designations B for battleship and then a hull number, such as B-1, B-2, etc. Same for destroyers, etc. D-1, D-2, etc. After WW1 (1918) a wider variety of naval vessels began to enter the USN inventory...blimps (airships/balloons), submarine tenders, salvage vessels, aircraft carriers (heavier than air vs airships), etc. Those vessels REQUIRED more than one letter, such as the aircraft carrier; the carrier (CV) was "C" for carrier and "V" for heavier than air (airplanes, not balloons). So, for paper work purposes, two letters were needed to maintain consistency and uniformity. Without such an organization, confusion would result. In 1920, the new designation for battleships and destroyers became BB & DD; "B" for battleship and "D" for destroyer, the second letters "B" and "D" meant nothing, other than making battleships and destroyers easier to document during administrative functions.

WWII US Gato class went about 21 knots surface; 9 submerged.

P=1.01325*10^5+1020*9.806*5=151336 (Pa) =151.336 kPa

Since 1Pascal = 1.45 x 10(power of -4) lb/square inch

then P = 15.1336 x 1.45 = 21.94372 = 21.94b/sq inch

It depends on the size of the boat and the type of water it's in (saltwater is more buoyant than fresh), but in most cases the average time is less than a minute from popping the corks on the Main Ballast Tanks to the time the Sail clears the waterline. The pictures you see of today's modern submarines only show about the top 1/5 of the boat; the rest is underwater. Once the Main Ballast Tanks start flooding and all that water comes in, it doesn't take much time to get underwater.