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| | Submarine - (Site not responding. Last check: 2007-11-06) |
 | | Large military submarines are generally classified either as attack submarines (designed to operate in the hunter-killer role against enemy shipping, including other submarines) or strategic ballistic-missile submarines, designed to launch attacks on land-based targets from a position of stealth. |
 | | Submarines designed for the purpose of attacking merchant ships or other warships are known as "fast attacks", "hunter-killers", "fast boats", or "fleet submarines" (which terms are not synonyms; each is a different design for a different mission). |
 | | The names of Royal Navy submarine classes, including ballistic missile submarines, are letter-based; thus, all boats of the Swiftsure class begin with the letter S and the Trafalgars, the letter T. Royal Navy submarines were originally designated alphanumerically, such as HMS A1 of the A-class of 1903 (built by the pioneer designer, John P. Holland). |
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