Proceedings Of The Marine

SUM 2014

Proceedings magazine is a communication tool for the Coast Guard's Marine Safety & Security Council. Each quarterly magazine focuses on a specific theme of interest to the marine industry.

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70 Proceedings Summer 2014 www.uscg.mil/proceedings A nswers Deck 1. A. You must sound three short blasts on the whistle. Incorrect answer. Reference: Inland Rule 34: The signal to indicate "I am operating astern propulsion" is only required when vessels are meeting or crossing within a half mile of each other. B. You must sound one blast if backing to starboard. Incorrect answer. Reference: Inland Rule 32: Defnes the terms "short blast" and "pro- longed blast," this choice does not specify either term. C. You must sound whistle signals only if the vessels are meeting. Incorrect answer. Reference: Inland Rule 34: Rule 34 applies to power driven vessels when in sight of one another and meeting or crossing within half a mile of each other. D. You need not sound any whistle signals. Correct answer. Reference: Inland Rule 34 only applies if both vessels are power driven, in sight of one another, and meeting or crossing within half a mile of each other. 2. A. 282 lbs. Incorrect answer. B. 294 lbs. Incorrect answer. C. 300 lbs. Incorrect answer. D. 304 lbs. Correct answer. Reference: 46 CFR Table 91.25-20(A)(1): Under Type Unit Carbon Dioxide: "Recharge if weight loss exceeds 10 percent of weight in charge." The weight of charge is 100 lbs. 10% of charge would be 10 lbs. Calculations are as follows: Recharge weight = Total weight of container and contents minus 10% of the charge weight. Recharge weight = 314 lbs. − 10 lbs. Recharge weight = 304 lbs. 3. A. Veer chain to the riding anchor. Incorrect answer. B. Heave to a shorter scope of chain on the riding anchor. Incorrect answer. Shortening the scope decreases the holding power of the anchor and does not decrease the yawing of the vessel. C. Drop the second anchor at the extreme end of the yaw and veer the riding anchor. Incorrect answer. This action will not employ enough scope to allow the second anchor to set correctly, thus increasing the possibility of fouling on the original set anchor. D. Drop the second anchor at the extreme end of the yaw, and then adjust the cables until the scope is equal. Correct answer. Reference: The Theory and Practice of Seamanship, Graham Danton, 11th Edition. Veering the chain until the length of scope is approxi- mately the same as the riding anchor will ensure ample holding power, assist in maintaining an equal strain on both anchors, and reduce yawing. 4. A. 1148 Incorrect answer. In order for the apparent sun to cross the meridian prior to 1200, the apparent sun would have to be ahead of the mean sun. B. 1200 Incorrect answer. This choice is not taking into account of the equation of time and thus defnes "mean sun." C. 1212 Correct answer. Reference: American Practical Navigator, 2002 Edition. If the mean sun is ahead of the apparent sun then the equation of time from the nautical almanac is added to Mean Solar Time. LAN = Mean Sun (+/-) the Equation of time LAN = 1200 + 12 minutes (the mean sun is ahead of the apparent sun) LAN = 1212 D. It cannot be determined from the information given. Incorrect answer. Summer2014_22.indd 70 5/13/14 9:46 AM

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