Show submarine Sun MARINE MN ra A CE IS S DWINDLING FAST Lisi listening ening devices depth bombs and destroyer fleet beating submarines CONVOY SYSTEM EFFICIENT wrecks of terrors strew bottom of english channel and north sea mine sweepers do good work london the menace of the german submarines and mines to the maritime commerce of the fillies allies Is becoming less week by week the tin pro Is due chiefly to the development of the listening devices and the depth bombs carried on oil tile the swift amov ing destroyers the is the most useful invention that tins has beert been discovered by the navy in its antisubmarine crusade and it is being improved upon fill all the time when it a U boat Is spotted from aloft by one of the alert observers la in the seaplanes sea planes which wing their flight over the north sea and the waters around the british isles esles lin he signals the position to the nearest destroyer directly lie gets this information her ter commander steams at full speed in the direction indicated until lie he can call hear the submarine plugging along under water the destroyer follows the U boat for hours if necessary until the commander thinks lie he lias has got the enemy in the right position for a lift hit and then lets go the bomb while the number of enemy undersell undersea craft that are sunk or captured each mouth month Is not given out tor for publication it is known that it equals the construction of submarines in ili germany the greatest blow to german hopes or of destroying the commerce of the allies on the ocean lies in the convoy convey system which alch is rapidly approaching c it perfection when plan of escorting transports and supply ships right across the atlantic lit in large fleets wad nilas first tried out there was considerable CV able delay on account of difference in speed of the various ships of which it was composed at the present time convoys tire are till all classified chissi fied according to speed anda fast transport can moke mah 0 a round roll I 1 id trip in 20 0 days dais while tit the slower class chiss of supply leips s drift across the lie ocean at a steady gibor rax or seven sevell knot wit nit the number of Bri britelli tilli antl american destroyers dost lias has increased rapidly and ail instill Is still growing growl ni so that there tire me plenty of f all these al essential watchdogs watch dogs of tile hie sea a 1 I 1 11 to make the passage of convoys across the atlantic and nii north sea secure the greatest percentage of losses by submarines ina rines since january I 1 tins has been in I 1 t t the mediterranean find and this Is now being reduced by increasing the number of destroyers in those waters iosub marine commander will risk attack on i a convoy which Is protected on oil all four sides by destroyers and frequently accompanied compa compan nied led by seaplanes sea planes naval experts are confident that when there tire are sufficient fent destroyers to escort till all convoys required require to transport troops troop and munitions from america ica to england and france the submarine peril will be practically ut ai an end this stage should be reached ly by august at the present time the U boats watch and wait for vessels which are alone the sinking of vessels in the irish soft sea tins has been due to the fact that the water there Is muddy and not too deep and id a 11 submarine can lie on the bottom up tip at night quite recently in two instances when steamships were torpedoed in the irish sea destroyers st blew one U boit boat to pieces with a depth charge and damaged the other one so seriously before site she could submerge that the commander surrendered with ills his crew pilots of seaplanes sea planes and airplanes who fly over the waters around the british isles have reported numbers of submarines which were sunk months ago and are lying on the bottom of the channel and north sea in addition to destroyers and patrol bonts boats which scour the surface in every direction there are all kinds of traps find and obstacles placed under water which make the passage of dover straits and exit from Heli goland bight n very complicated problem for a U boat conin commander jander to solve alund hundreds reds of mine sweepers manned by fishermen and sailors ballora from th 6 merchant I 1 service are at work day and night making the he ocean lanes safe for steamships belonging to the allies and neu i aral nations their crews have become adepts in the art of finding and exploding german mines hidden below the surface during the year ending in april more mord than 1000 mines which cust cost 1000 each jo to construct wore were exploder or captured by d the british mine sweepers bwee pers the loss of mine sweepers was as very small in comparison in one instance a mine sweeper found a german mine drifting in the north sea and towed it over well in toward the ibe mouth of elbe under cover of fog after pumping it up the crew set the mine 20 feet below the surface and 12 hours later it was wag struck by a german steamship bound for gothenberg from bremen and tho vessel and her cargo of iron ore went benj to the bottom the increasing hazard against submarines ever returning to port Is making it difficult for the german admiralty to get crews fe man them |