The Victory at Sea

Appendix VIII

Monthly Losses Since February, 1917, From Enemy Action

During the twenty-one months of unrestricted submarine warfare from February, 1917, to October, 1918, inclusive, 3,843 merchant vessels (British fishing vessels included) of a total gross tonnage of 8,478,947 have been sunk by enemy action, a monthly average of 183 vessels totalling 403,760 gross tons. The October tonnage losses show a decrease from this average of 291,333 gross tons, or 72 per cent.

The following gives the tonnage losses by months from February, 1917, to October, 1918, inclusive:

Period.	British Merchant Vessels.	Other Allied Merchant Vessels.	Neutral Merchant Vessels.	British Fishing Vessels.	Total
1917
February	313,486	84,820	135,090	3,478	536,334
March	353,478	81,151	165,225	3,586	603,440
April	545,282	134,448	189,373	5,920	875,023
May	352,289	102,960	137,957	1,448	594,654
June	417,925	126,171	139,229	1,342	684,667
July	364,858	111,683	70,370	2,736	549,647
August	329,810	128,489	53,018	242	511,559
September	196,212	119,086	29,941	245	345,484
November	173,560	87,646	31,476	87	292,769
December	253,087	86,981	54,047	413	394,528

Period.	British Merchant Vessels.	Other Allied Merchant Vessels.	Neutral Merchant Vessels.	British Fishing Vessels.	Total
1918
January	179,973	87,078	35,037	375	302,463
February	226,896	54,904	36,374	686	318,860
March	199,458	94,321	51,035	293	345,107
April	215,453	50,879	11,361	241	277,934
May	192,436	80,826	20,757	504	294,523
June	162,990	51,173	38,474	639	253,276
July	165,449	70,900	23,552	555	260,456
August	145,721	91,209	41,946	1,455	280,331
September	136,864	39,343	10,393	142	186,742
October	57,607	41,308	13,512	—	112,427