Show Experts Expert's Daily Review of War WarBy I By J. J W. W T. T Mason United Press War Expert NEW YORK April 24 It If If the daring British naval adventure off oft Ostend and Zeebrugge has sealed those harbors against the passage of ot submarines a heavy decline in sinking of merchantmen by U- U boats will be the immediate result The only other ports German submarines can use for their bases if it Ostend and Zeebrugge have been bottled up are those off of the Ger- Ger can coast Between Betwee Belgium and Germany th the coast intervenes intervenes intervenes inter inter- venes which would would- make it necessary necessary necessary sary for the submarines to travel miles northward of ot the Belgian harbors before they reached 1 friendly waters The distance from Os Ostend tend to the Irish coast is only miles and it is within this area that most of ot th the submarine attacks are made By adding miles to the U-boat U Journeys the reserve power of ot the piratical craft would be seriously disturbed At the same time the nervous train which is known to tobe tobe tobe be an important reason for the decreasing efficiency of or the submarine submarine submarine sub sub- marine crews would be much in increased in- in creased creased The increased miles of tr travel vel would be through the heavily patrolled North sea necessitating necessitating necessitating ne ne- ne- ne continuous operations I under the surface which are highly destructive of ot morale An enforced addition of one- one third to the of ot the U-boats U would make them by that much the more liable to attack bythe by bythe bythe the new depth bombs which are giving such satisfactory results If It therefore the Belgian submarine submarine submarine rine bases have been blocked there Is certain to be an important rise In the curve curvo showing the destruction destruction destruction tion of or the undersea craft Should the number of submarine victims announced next week and the week following show a n striking striking ing decline it may be taken for granted that the British navy has been successful in its purpose If It however it is la demonstrated that the initial attack was not wholly successful theo the possibilities to be gained may well cause the allies to U try once more |