New England Sailing Center

 We are an American Sailing Association sailing school located at 47 Conanicus Ave in Jamestown, RI 02835

Our phone number is 401 619 1697 

Hands on training.  Buzzards Bay Light Tower and an instructor demonstrating hand bearing compass use sighting the Tower.




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ASA 105: Skill 10, Calculating Deviation

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  10. Check compass deviation by a transit bearing or other means. Compass deviation is how we address the magnetic field of a vessel.  Deviation may change over time as the magnetic field of the yacht changes.  This is more common for steel or wooden hulls fastened with iron than for fiberglass yachts.   There are two basic ways to check deviation.  The first and oldest is by using a table of the sun's true bearing at sunrise and sunset for a given latitude.  The other is by using a charted range (transit bearing).  We will look at the range method. Nantucket Harbor Channel Range This is similar to the range used in the example, Cleveland Ledge Channel Range. The yacht should move right to get the ranges aligned The TVMDC AW formula is used.  When D is unknown, the arithmetic result is D using TVMDC.  In such a case, TVM and C are knowns so we solve for D. Turning to Chart 1210 Tr, observe the charted "Cleveland Ledge Channel" range for...
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ASA 105: Skill 7, Aids to Navigation, Unlighted marks

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7. Explain the significance of shapes, colors, and lights used in the U.S. Aids to Navigation (ATON) system. Nun buoy Conical top is a requirement for nun buoys.  If marking a channel they have even numbers are red in color and are left to starboard when entering, port when departing. Ready references include: Chart One , Page 125  Eldridge 2022,  Page 214 Boat Navigation for the Rest of Us, inside flaps and back cover Shapes and colors are important for day piloting.  Lights on buoys are often correlated to the color of the buoy itself. Nuns have conical tops.  Red nuns with even numbers are lateral marks denoting the left side of the channel when heading seaward.  Nuns are not lighted. Cans have cylindrical tops.  Green cans with odd numbers denote the right side of the channel when proceeding seaward.  Cans are not lighted. Tower buoys may have a sound signal or a light or both.  The color denotes the buoy's significance.  Red or Gree...
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ASA 105: Skill 9, Measurements

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