### TVMDC Explained

TVMDC is a kind of acronym known as a mnemonic initialism. It’s an easy to remember abbreviation word. That means each letter in the acronym stands for the first word in a longer term. It stands for true heading, variation, magnetic heading, deviation, compass heading. Sometimes it will be called true variation magnetic deviation…

### Distance, Speed, Time Worksheet

Coastal Navigation Course Chapter VI Distance, Speed, Time Worksheet Remember: Convert Minutes to Decimals (and back) and Round Answers Distance: Speed: Time: 1. 15.0 nm 8.6 1 hour 45 minutes = 1.75 hours Calculation:Â D Ã· T = S – 15.0 nm Ã· 1.75 hours = 8.57 kts 2. 12.5 nm 7 kts 1 hour 47…

### Answers to Relative Bearings Practice Lesson

Coastal Navigation Course Chapter IX Answers to Relative Bearings Practice Lesson 1. Brenton Reef light bears 225Â° T. Your current course is 059Â° T. The relative bearing of Brenton Reef light isÂ 166Â°. True Bearing – Ship’s Heading = Relative Bearing – 225 – 059 =Â 166 2. Cleveland Ledge Channel light bears 325Â° relative. Your course…

### How to use dividers

Navigation Tools How to use dividers Using dividers and the latitude scale on your nautical chart, you are able to measure distance in nautical miles. (Remember, do not use longitudes to measure distance. Longitude lines converge at the poles and the distance between them changes relative to your position on the earth.) One minute equals…