HMS Seahorse (98S)

HMS Seahorse was a Royal Navy S class submarine.

She was lost at sea with all hands in Heligoland Bight, North Sea between 25 December 1939 and 1 January 1940.

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First Group
S-class submarine
Swordfish \| Sturgeon \| *Seahorse* \| Starfish
Second Group
Sealion \| Salmon \| Shark \| Snapper \| Spearfish \| Sterlet \| Sea Devil \| Sunfish \| Seawolf
Third Group
Saracen \| Satyr \| Safari \| Sanguine \| Saga \| Sahib \| Sceptre \| Scythian \| Scotsman \| Scorcher \| Sea Scout \| Seneschal \| Sentinel \| Selene \| Sea Dog \| Sea Nymph \| Sea Rover \| Seraph \| Shakespeare \| Shalimar \| Sibyl \| Sickle \| Simoom \| Surf \| Stubborn \| Sirdar \| Sidon \| Sleuth \| Solent \| Splendid \| Spiteful \| Sportsman \| Spearhead \| Spur \| Springer \| Spark \| Spirit \| Stoic \| Storm \| Stonehenge \| Strongbow \| Statesman \| Sturdy \| Stratagem \| Stygian \| Supreme \| Subtle \| Syrtis \|
List of submarines of the Royal Navy List of submarine classes of the Royal Navy