U S Navy Submarine Manual

7700 Arlington Blvd. 5113 Falls Church, VA This is an official U.S. This is a Department of Defense (DoD) Internet computer system. Official website of the Naval Sea Systems Command (NAVSEA), the largest of the U.S. Navy's five system commands. With a force of 74,000 civilian, military and contract support personnel, NAVSEA engineers, builds, buys and maintains the Navy's ships and submarines and their combat systems. Honor it is to serve as a U.S. BUD/S Phases Phase 1—Physical Conditioning (eight weeks) Soft sand runs Swimming—up to two miles with/fins in the ocean Calisthenics Timed obstacle course Four-mile timed runs in boots Small boat seamanship Hydrographic surveys and creating charts Hellweek—week4ofphase1—fiveandone-halfdaysof. The Naval Ships' Technical Manual (NSTM) provides technical information to personnel involved in supervision, operation, and maintenance of U.S. Navy ships and submarines. The various chapters and volumes of the NSTM contain detailed administrative and technical instructions that augment other authoritative documents.

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• U S Navy Submarine Manual Download
• U S Navy Submarine Manual Online
• U.s. Air Force

The USN originally procured torpedoes by contracting with private manufacturers. Each vendor was assigned their own Mark number series and was given a designation in metric or in metric and english dimensions specifying how large was the torpedo in both diameter and length and the manufacturing name. For example, the first Bliss-manufactured torpedoes based upon the Whitehead torpedo patents were designated as the Whitehead 3.55m x 45cm Mark I. The first Bliss-Leavitt torpedoes manufactured to their own design were designated as Bliss-Leavitt 5m x 21-inch Mark I.

In 1913, the practice of assigning a series of marks to each manufacturer was changed to a single series of marks covering all manufacturers and older torpedoes were redesignated. Surviving 45 cm torpedoes were designated as Types A through C while the 21-inch torpedoes were designated as Mark I through Mark 4. Details may be found in the Pre-World War II USA torpedo datapage. From that time onwards, the Mark number alone, or in a few cases the Mark and Mod numbers, uniquely identifies each torpedo.

USA torpedoes since that time are simply designated with 'Mark' followed by a Numeral and a 'Mod' followed by a number representing the change made since the basic design. For example, the Designation 'Mark 12 Mod 2' means that the torpedo is the twelfth torpedo designed by the USN and that it has undergone two design revisions since the first model.

In 1922, all torpedoes prior to the Mark 7 were declared obsolete and removed from service. As of that point, only the Mark 7 (17.7') and Marks 8, 9 and 10 (all 21') remained in service.

All USN 18 inch torpedoes are actually 17.7 inches (45.0 cm) in diameter.

During World War I production was at the Alexandria Torpedo Station at Alexandria, Virginia. This station was closed shortly after the war ended. Production prior to World War II was at the Naval Torpedo Station at Newport, Rhode Island. Efforts to reopen the Alexandria Station prior to World War II were frustrated for political reasons for 11 years before it was finally reopened in July 1941. In addition to these two, Bliss and the Pontiac Division of General Motors made torpedoes during World War II and Westinghouse developed the Mark 18 Electrical Torpedo. After World War II, Honeywell and later General Dynamics were the primary manufacturers while General Electric made some of the acoustic ASW torpedoes.

The first USN torpedo was the Howell which used a flywheel for power. Although modestly successful, the Whitehead type using compressed air was adopted as it was suitable to improvements to increase range and warhead size.

Unlike other nations, the United States abandoned the Whitehead compressed air torpedoes in favor of turbine propulsion as early as November 1907. Wet-heater propulsion systems were introduced to USN torpedoes during the 1920s and became the primary motive power for the next two decades.

For example, the Mark 13 airborne torpedo of the 1930s-1940s was an alcohol-fuelled freshwater wet-heater using a two-stage impulse type turbine with contra-rotating rotors, no stator and three nozzles. More energetic fuel systems including ones using pure oxygen and hydrogen peroxide ('Navol') instead of air were tested in the 1930s but these developments were dropped due to technical difficulties.

Newport Station worked intermittently on electric torpedoes between the wars, but it was not until a captured German G7e was supplied by the British in 1941 that interest was aroused enough to place a development contract. These torpedoes were very popular with the US Submarine force as they were essentially wakeless. However, post-war analysis showed that Japanese merchantmen rarely noticed a wake and the rather slow speed of the Mark 18 resulted in the standard wet-heater torpedoes having a 17% better hit rate against merchant ships and 250% better against escort ships.

Experiments with Navol were revived during World War II with about 1,000 torpedoes being completed too late to see service.

Post war torpedoes have been mainly electrics and otto-fueled pistons.

Between 01 January 1917 and 30 November 1918, a total of 5,910 Mark 7 and Mark 8 torpedoes were ordered with 1,982 being actually delivered during this time period. However, the massive numbers of 'flush-decker' destroyers completed during and after the war resulted in a total production of about 3,000 Mark 8 torpedoes.

Us Navy Submarine Dimensions

The numbers above are rounded off and include all torpedoes produced during the 1930s.

The United States manufactured a total of 57,653 torpedoes between 1 January 1939 and 1 June 1946. Newport built 18,751, Alexandria built 9,920, Westinghouse 8,250, Forest Park 8,391, St. Louis 6,257, Keyport 795, and Pontiac and International Harvester built 5,289.

The earliest weapons used wet gun-cotton. Just prior to World War I, this was replaced with TNT. Torpex (TPX) was introduced in the Fall of 1942. In the late 1940s Torpex was replaced by HBX, then H-6 in the 1960s and by PBX in the 1970s.

Unlike other nations, the United States abandoned the Whitehead compressed air torpedoes in favor of turbine propulsion as early as November 1907. Wet-heater propulsion systems were introduced to USN torpedoes during the 1920s and became the primary motive power for the next two decades.

For example, the Mark 13 airborne torpedo of the 1930s-1940s was an alcohol-fuelled freshwater wet-heater using a two-stage impulse type turbine with contra-rotating rotors, no stator and three nozzles. More energetic fuel systems including ones using pure oxygen and hydrogen peroxide ('Navol') instead of air were tested in the 1930s but these developments were dropped due to technical difficulties.

Newport Station worked intermittently on electric torpedoes between the wars, but it was not until a captured German G7e was supplied by the British in 1941 that interest was aroused enough to place a development contract. These torpedoes were very popular with the US Submarine force as they were essentially wakeless. However, post-war analysis showed that Japanese merchantmen rarely noticed a wake and the rather slow speed of the Mark 18 resulted in the standard wet-heater torpedoes having a 17% better hit rate against merchant ships and 250% better against escort ships.

Experiments with Navol were revived during World War II with about 1,000 torpedoes being completed too late to see service.

Post war torpedoes have been mainly electrics and otto-fueled pistons.

Between 01 January 1917 and 30 November 1918, a total of 5,910 Mark 7 and Mark 8 torpedoes were ordered with 1,982 being actually delivered during this time period. However, the massive numbers of 'flush-decker' destroyers completed during and after the war resulted in a total production of about 3,000 Mark 8 torpedoes.

Us Navy Submarine Dimensions

The numbers above are rounded off and include all torpedoes produced during the 1930s.

The United States manufactured a total of 57,653 torpedoes between 1 January 1939 and 1 June 1946. Newport built 18,751, Alexandria built 9,920, Westinghouse 8,250, Forest Park 8,391, St. Louis 6,257, Keyport 795, and Pontiac and International Harvester built 5,289.

The earliest weapons used wet gun-cotton. Just prior to World War I, this was replaced with TNT. Torpex (TPX) was introduced in the Fall of 1942. In the late 1940s Torpex was replaced by HBX, then H-6 in the 1960s and by PBX in the 1970s.

Approximately 1.9 lbs. (0.9 kg) of wet gun-cotton is equivalent to 1.0 lbs. (0.45 kg) of TNT.

Torpex is a mixture of 37-41% TNT, 41-45% RDX (cyclonite, cyclomethylene trinitramine) and 18% aluminum. HBX and H-6 are also TNT based with additives to increase their explosive power or increase their stability.

Torpex is attractive because of the increased explosive energy and higher detonation velocity of RDX as compared to TNT and the prolongation of the pressure wave by the aluminum. On a weight basis, Torpex is conservatively estimated to be about 50% more effective than TNT as an underwater explosive against ships. However, Torpex is more sensitive than TNT and RDX is expensive and difficult to make safely.

The failure of the US Magnetic Pistol and backup striker gear is well known. Much of this was due to peacetime economies, but excessive secrecy and far too little communications between the Naval Torpedo Station and the Fleet were also to blame, as well as the reluctance of the Bureau of Ordnance to accept good evidence of defects.

The result was that it was not officially announced until August 1942 that the standard submarine torpedo Mark 14 ran 10 feet (3 m) below its depth setting and not until June 1943 that the magnetic pistol was ordered to be disabled. However, long before this time, many submarine commanders were putting to sea per orders with activated pistols only to deactivate them once out of sight of land. The contact exploder faults were finally rectified in September 1943 but magnetic exploders were distrusted as late as thirty years after the war ended.

'Naval Weapons of World War Two' by John Campbell
'The Naval Institute Guide to World Naval Weapons 1991/92' and 'US Naval Weapons' both by Norman Friedman
'U.S. Navy Bureau of Ordnance in World War II' by Lt. Cmdr. Buford Rowland, USNR, and Lt. William B. Boyd, USNR
'Ship Killers: A History of the American Torpedo' by Thomas Wildenberg and Norman Polmar

A series of articles about USA Torpedoes
Information on USA Torpedo Data Computer (TDC)
A Brief History of U.S. Navy Torpedo Development
Information on USA Target Bearing Transmitter (TBT)
Training Manual on USA Fleet Submarine Torpedo Tubes
Training Manual on Destroyer Torpedo Fire Control Equipment
Graphic showing the development of USA Torpedoes (5.2 MB JPEG)

05 November 2007 - Benchmark
20 December 2010 - Updated Nomenclature
23 October 2019 - Converted to HTML 5 format

Overview

U S Navy Submarine Manual Download

This section reviews the anticorrosive and antifouling coating systems specified for submarine underwater hull preservation. The underwater hull of a submarine is defined as the exterior area on the submarine below the waterline. This is considered a critical coated area because coating damage or failure cannot be seen without dry-docking.

Typical Coatings Used

Antifouling coatings are applied on top of the anticorrosive on exterior surfaces to prevent marine growth. The underwater hull of submarines are coated with an anticorrosive and antifouling paint system. The anticorrosive component of the coating system protects the substrate from the seawater, while the antifouling paint is necessary to help reduce drag in the water. The anticorrosive and antifouling coating system used should be in accordance with MIL-PRF-23236, Coatings Systems for Ship Structures, MIL-DTL-24441, Paint, Epoxy-Polyamide, General Specification for, and MIL-PRF-24647, Paint System, Anticorrosive and Antifouling, Ship Hull as specified in Submarine Maintenance Standard (SMS) 6310-081-015 – Submarine Preservation and NAVSEA Standard Item (NSI) 009-32.

The exterior hull with SHT (Special Hull Treatment) installed, the David Taylor Research Center paint system (DTRC 2844-1110 and 2844-1109) may be used on the hull beneath and adjacent to SHT surfaces. A coating qualified to MIL-DTL-24631A Navy Formula 187 is applied on top of SHT surfaces.

Specific guidance on the application and repair of nonskid deck paint applied over SHT/MIP-SHT

SSN-688 Class – Technical Handbook for Special Hull Treatment Maintenance and Repair for Submarines: NAVSEA S6360-AD-HBK-010. For Fairing Compound, use NAVSEA Drawing 605-6160358.

SSN-21 Class – Submarine Mold-in-Place Special Hull Treatment a and Repair Manual: NAVSEA S6360-AN-MMA-010/SHT

SSN-774 Class – Maintenance and Repair Manual for Virginia Class Submarine Mold-in-Place Special Hull Treatment: NAVSEA S6360-AV-MMA-010

Surface Preparation

U S Navy Submarine Manual Online

According to NSI 009-32, the underwater hull is considered a critical coated area. To ensure proper coating adhesion, special attention should be paid to surface preparation of this area. All surface preparation work must be accomplished in accordance with NSI 009-32 and Submarine Maintenance Standard (SMS) 6310-081-015 – Submarine Preservation.

Depot Repairs

For Depot repairs, refer to Submarine Maintenance Standard (SMS) 6310-081-015 – Submarine Preservation and NSI 009-32 is the governing document for preservation requirements.

Submariner Repairs

Submariners are primarily responsible for maintaining the submarine's underwater hull coating system until repair activity maintenance is scheduled. Naval Ships Technical Manual: Chapter 631 (NSTM 631), Preservation of Ships in Service – General provides requirements, instructions, and guidance for surface preparation and coating application.

New Construction

New construction ships are painted in accordance with the ship build specification for that class of submarine.

SUBMEPP Point of Contact

SUBMEPP provides centralized life-cycle maintenance solutions and support for U.S. Navy submarines and submersibles. SUBMEPP is under the Submarine Directorate of the Naval Sea Systems Command (NAVSEA).

Brandon Wohl
(207) 438-6198

U.s. Air Force

NAVSEA Point of Contact

The Naval Sea Systems Command (NAVSEA 05) is the technical authority for in-service submarine preservation-related work.

Kevin Klucher
Naval Sea Systems Command, SEA 05
(202) 618-4167