Show I iH ARB 0 R CAB CABLE l EI I SAVES SHIPS IN i NEW NE YORK Guides Boats in Rough W Weather cather Through Seas NEW YORK OhI Au r Au The U. 11 Tue 11 Tha principle principle prin prin- ciple of t follow rollow he tho green line Uno used successfully b by the management of ot Now ew Yorks York's subway system in handling han ban crowds at congested transfer points has been adapted In a meAn meAn- I tire lire to safety ty to ships at I sea Il around crowded harbors Instead of ot ofa a visible ren lIn line however a device tins has been boen perfected per whereby vessels seeking their th way Into barbor harbor harbor har bar bor in thick weather r can enn follow with I a submerged and nd energized wire In tho tile outer reaches of or New York harbor harbol where deep water vater meets shoals l th there re begins a Il marine marino passageway pas pu s known as an Ambrose Ambroso channel This channel leads up through the tho narrows Into tho the Inner harbor nn and to tho docks dock and In this channel tho the guiding cable has hns been boen laid Ships properly equipped d to take advantage c cof of its guiding powers can ean n follow it through nn any kind of ot weather with the same amo d degree of assurance as can the passenger who seeks to make his way from Grand Central terminal nal n to Times square Cable Save Saves Ships The d device consists of ot a cable sixteen sixteen six six- six six- te teen n miles long laid In the center of or the channel It Is energized with an alternating curr current nt from the shore shon Ships to take ad advantage e of or I It must be equipped with or listening devices attached to the tho hull Approaching tho the channel the tho sound waves wl emitted by tho cable can be heard for tor some distance and tho the Increasing or decreasing strength of ot the sound enables the tho ship to be steered until It Is right over the source It U is then a 0 simple matter matterI to follow It Its course through h tho the dredged channel de despite storm or fog foS- which would mako make the tho marking buoys Invisible or would tend to confuse confuso confuso con- con fuso fuse the tho warning notes of automatic hell bell and whistle markers This cable is but an additional protection for tor shipping entering American ports It supplements tho tim thoI I radio compass Installed and operated by the naval communications service ser Mr- vice now in successful US use all along lon tho Atlantic coast By Bv the tho compass ships can ascertain their exact posItion position tion in any kind of w weather ather Another Another An An- other protection T recently tried out by the navy y department Is a machine machino ma- ma chino chine for determining depth of or water and proximity of other ships through the tho readings of sounds from the propellers propellers pro pro- reflected back from the bottom hot bot tom torn or orne-arby orne nearby bodies 8 |