National Geographic : 1957 Feb
+Pathfinder Chulrns Past Shishaldin Volcano, Aleutian Landmark Nautical charts serve the ship's navigator as road maps of the sea. They reveal the \water's depth, safe channels, submerged hills, shoals, and wrecks. To chart nearly 100,000 miles of tidal shoreline and inshore waters, the Survey maintains a fleet of seventeen ships, includ intg sixmajor seagoing vessels. One hundred officers and men aboard the .. iO-loot, diesel powered PIathtliftlr spent the summer of 1956 in the Icering Sea making depth recordings for nautical charts. IlHere the vessel speeds toward King Cove on the 'Pacitic side of fc OIh 1 ,the Alaska Peninsula to pick up fresh food supplies from Seattle. SWashington. Shishaldin Vol - cano, rising 9..S7 feet above inimak Islain(l is one of the few almost Iperfect cones. ,-Page 190, lower: The Survey ship P'ion'erl charts \\water dcl)ths antI1 ottoml contours aloln lh approaches to San Francisco's Golden G(ate. lhtre in the plot tin- room below deck, the crew man at right checks the vessel's position on a Shoran inst rument. lt. Comdr. 11. S. Cole, Pio ne'r's electronics officer,examines the fathonmeter's .raph of an odd pinnacle formation on the ocean floor off San Francisco.