NETS METS TO CATCH SUBMARINE submarines SUO MARINES S british admiralty adopts novel plan to trap underwater craft london at harbor entrances and other strategic points around the arit ish isles the admiralty liaa has set illies tf or submarine traps to catch Clera ian underwater craft engaged in bloc blockade kad ing england tile traps set for or t arc am not unlike gill nets used by usher fisher inba leable iron frames ten tell feet equart equa rB ahrea frames jointed are arc sunk 1 io ii A depth ot of thirty feet suspended irom froin Inin immense lense buoys the submarine is a 1 blind thing under tinder water steering ly by chart and compass entering one ot of these frames its sides are caught causing the lower frame to buckle upward catching the lie propeller thus held the craft Is IH in the position of a aleh floundering in ili a net andeits and its mccu pants are doomed