Battle of Moon Sound

16 October – 3 November 1917, Moon Sound and the Gulf of Riga

German victory

Part of Operation Albion, the German invasion of the Estonian islands, fought while the Russian fleet was in revolutionary turmoil. The dreadnoughts König and Kronprinz broke into the Gulf of Riga and fought the two old Russian battleships, Slava and Grazhdanin, the former Tsesarevich, in Moon Sound. Slava was holed and scuttled in the channel. The Germans lost a torpedo boat and several minesweepers to mines, and two battleships were mined.

Britain + Russia

28+ ships, 2 lost

Royal Navy

3 ships, none lost

Flotillas and other craft	Number	Lost
Submarines British submarines operating with the Russian fleet.	3	0

Flotillas and other craft

Number

Lost

Submarines

British submarines operating with the Russian fleet.

Imperial Russian Navy

25+ ships, 2 lost

Ship	Type	Outcome
Slava Holed below the waterline	Pre-dreadnought battleship Borodino class	Scuttled
Grazhdanin Also known as Tsesarevich hit twice	Pre-dreadnought battleship Tsesarevich class	Survived
Bayan	Armoured cruiser Bayan class	Damaged
Grom	Destroyer	Sunk

Flotillas and other craft	Number	Lost
Destroyers Not counting Grom.	21	0
Cruisers and gunboats	5	0

Flotillas and other craft

Number

Lost

Destroyers

Not counting Grom.

Cruisers and gunboats

Imperial German Navy

20+ ships, 8 lost

Ship	Type	Outcome
SMS König	Dreadnought battleship König class	Survived
SMS Kronprinz Ran aground	Dreadnought battleship König class	Survived
SMS Bayern Mined	Dreadnought battleship	Damaged
SMS Grosser Kurfürst Mined	Dreadnought battleship König class	Damaged
SMS Kolberg Shelled the Võilaid battery	Light cruiser	Survived
SMS Strassburg	Light cruiser	Survived

Flotillas and other craft	Number	Lost
Other battleships and battlecruiser Germany sent 10 battleships and 1 battlecruiser in all.	7	0
Other light cruisers Germany sent nine light cruisers; sources consulted name only Kolberg and Strassburg.	7	0
Destroyers, torpedo boats and minesweepers Torpedo boat S64 and seven minesweepers were lost to mines.	50+	8

Flotillas and other craft

Number

Lost

Other battleships and battlecruiser

Germany sent 10 battleships and 1 battlecruiser in all.

Other light cruisers

Germany sent nine light cruisers; sources consulted name only Kolberg and Strassburg.

Destroyers, torpedo boats and minesweepers

Torpedo boat S64 and seven minesweepers were lost to mines.

50+

Map

Operation Albion October 1917