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Any good scientific calculator can be used for sight reduction, sailings, and other tasks. Marine navigation latitudes 30° − 45°, inclusive national imagery and mapping agency. Navigation principles enabling objectives know terms associated with the terrestrial coordinate system; equator, prime meridian, great circle, small circle, parallel, meridian, latitude, longitude, and rhumb line understand the concept of projections and the main projections used in navigation. Chapter 1: navigation with wind navigation or deck officer has to be extremely careful while steering a vessel from its course no matter where the ship is – at mid sea, crossing channel, or entering/ leaving a port. One of the most important judgments the navigator must make involves choosing the best methods to use. Types of navigation methods of navigation have changed throughout history.
Page ii interpolation table altitude difference ( d) double second diff. Use of calculators in navigation anycommoncalculatorcanbeusedinnavigation, even one providing only the four basic arithmetic functions of ad- dition, subtraction, multiplication, and division. New methods often enhance the mariner’ s ability to complete his voyage safely and expeditiously, and make his job easier. The team at the bridge should be efficient enough to sail the ship in all kinds of waters and weather. Nav 102 3/ 6 minute rule set & drift fix intervals chart prep log book entries variation agenda 3 minute rule / 6 minuterule 3 minute rule − speed ( kts) * 100 = distance ( yds) traveled in 3 minutes example: if traveling 20 knots, the distance you' ve traveled in 3 minutes is as follows: 20kts * 100 = yds.
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