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. SECURING "WAR-SHOT" HOMING TORPEDOES Is Electronic Marvel By RON DEVANEY Awarm "'layer' of water can it. of The Times Staff " ; , b disrupt sound signals and a he mortars can be ram- If Christopher Columbus could syhmarine can hide beneath a loaded, aimed and fired in less go aboard the $27,000,000 elec- javer, than 30 seconds, Their range is tronic marvel called the St. '4 omb-shaped instrument classified. They and the anti- Laurent he would fairly drool cajjed a bathythermograph can craft gun are stabilized for roll over the advancements built into he jowered into the water (itand pitch and can be trained Canadian Navy ships. would be used every hour under and fired automatically by com- The Genoa sailor made his «ajert" conditions) and used to puter. epic voyage to the New World pio temperature against depth. The warshot torpedoes ate in a tiny sailing craft, driven" with this knowledge, the seven-foot sticks of destruction only by the wind and hope. the performance of sonar units. Navy says the copter is worth Oshawa Cimes OSHAWA, ONTARIO, SATURDAY, JULY 31, 1965 variable depth sonar unit can equipped with their own sonar { Today, officers and ratingS he yseq to great affect. It can units which enable them to | have it '"'easy". Air conditioning pe jowered over the stern and search out a sub and destroy is a fact of sea life, even in the "streamed" (it does not affectit. They are cartridge-fired engine room. Navigational aids the ship's manoeuvrability ap-from mountings amidships, The abound. Meals are hot, and well- preciably) to a maximum depth St. Laurent carries 10; loading prepared. Living quarters Fe oF 399 feet. is done via a deck track. comfortable. And for a fighting ship, such the helicopter (carried in afeet, "warm up for one min- as the destroyer-escort St. Laur- hangar amidships) carries a ute, search in a spiral pattern ent, its combat weapons @f@dunking sonar' unit similiar before "homing-in" on the said to be second to none.. Into the VDS. The helicopter's target. They will automatically other words, it is as up-to-date tactical advantage is that it disarm themselves if they come as it can be. can't be heard by a submarine above 75 feet and therefore, will FIRST WITH 'COPTER beneath the surface, while anot attack a surface vessel, The ship that city residents Szter® Tu can be detected oppoRTUNITY WEAPON have had a chance to see in The Navy describes this tor- Oshawa Harbor is the first of CARRIES TORPEDOES pedo as '"'a weapon of opportun- 13 Canadian ships to be equip- The whirlybird atso carries ity", used only when a_sub- ped with a helicopter. torpedoes which can be dropped marine is inside a destroyer's This "air-arm'" addition aids in the water to "chase" a sub- mortar range; for example; in its role as a submarine hunt- marine. Backing up this unit right under the ship. er. It is specifically armed and are the sub chaser's weapons: jn wartime, surface actions designed for mid-ocean escortLimbo mortars, Warshot tor- are "fought from the bridge," (of convoys) duties, has a 10,000 pedose and a twin-barreled, 50- while attacks on submarines and mile range (fuel) and can feed calibre, anti-aircraft gun for- enemy aircraft are directed its complement of 230 men for ward, from the Operations - Room three months without replen- The mortars are in a three-pelow. This becomes the "brain ishing supplies. barrel set, the whole unit centre." Four different sonar units mounted in a "cradle" to facili- Information from radar and make this a tough target for atate loading and aiming. They sonar units is fed into plotting sneaky enemy submarine tofire 393-lb. bombs, in a_ tri-tables where the entire action In addition to all these aids, The torpedoes go down to 75 ' beat. There is a long-range angular pattern, which sink tocan be followed and attack | sonar unit, one for 3000 to 5000a pre-set. depth (found with moves figured. Computers ana- yards, an "'attacker" unit goodsonar aid) before exploding. jyze the data. Electronic up to 3000 yards and a Their "kill" range is 30 feet. wizardry takes over, except for | "Cockshafer" unit under the One of these three-barrel units the finger which pushes the bow to aid in finding a bot- and a rear gun mounting have-fire" button. -tomed" submarine. been sacrificed on the St. Water conditions such as Laurent to provide for the temperature and depth affecthelicopter's flight deck. The --Times Photos By Bruce Jones SIGNAL FLAGS THROUGH HATCHWAY ENGINEERS CONTROLLING ST. LAURENT'S SPEED