. Commercial fisheries review. Fisheries; Fish trade. 35 was also tested in offshore waters in winds that forced other fishing vessels back to har- bor. PS-Type Anchor The PS-type anchor (fig. 2) was designed to keep the bow of the vessel into the wind and waves while drifting at night, or when a vessel breakdown occurs in foul weather. In offshore waters near Cape Flattery, we tested models PS-70 and 50, in addition to the F-140, in winds of 38 knots gu sting to 63 knots. When the wind gusted above 38 knots the bow of the John N. Cobb would swing away from the wind direction, and 2-3 minutes
. Commercial fisheries review. Fisheries; Fish trade. 35 was also tested in offshore waters in winds that forced other fishing vessels back to har- bor. PS-Type Anchor The PS-type anchor (fig. 2) was designed to keep the bow of the vessel into the wind and waves while drifting at night, or when a vessel breakdown occurs in foul weather. In offshore waters near Cape Flattery, we tested models PS-70 and 50, in addition to the F-140, in winds of 38 knots gu sting to 63 knots. When the wind gusted above 38 knots the bow of the John N. Cobb would swing away from the wind direction, and 2-3 minutes were re- quired to reestablish the bow into the wind. After additional lines totaling 400 feet were Towline Tension Measured We measured towline tension, of the types and sizes tested, under various wind veloci- ties and towline lengths. Generally, the amount of tension increased as the towline was lengthened. For example: using 300 feet of towline with wind velocity at 40 knots, the tension was 1,000 pounds; with 400 feet of towline and the same wind velocity, tension was 2,000 pounds. Using the PS-50 anchor, the minimum amount of tension recorded was 900 pounds at wind velocity of 26 knots. With the F-140, m aximu m tension was 4,000 pounds at 63 knots. The PS-70 appeared to be the best size for the John N. Cobb, which is 93 feet long, 25 feet in beam, and draws feet. An additional anchor, the F-220, Ship Direction of Wind Buoys-. Shackles—^ Connecting Webbing Suspension Line- Fig. 2 - General arrangement of Luck-Anchor PS-type. payed out, the swinging motion nearly ceased. Had the towline been bridled through both the port and starboard chocks--causing a straight pull on the bow - -this motion might not have oc - curred. Several times, the lines were changed from the bow to the stern, resulting in the stern being held into the wind and waves. During all the tests, the rolling of the ship was greatly reduced and the crew and staff were well pleased with the anchor's pe
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