A fathom is a unit of length equal to 6 feet used to reference the depth of water. Before this measurement was standardized, sailors identified a fathom as the distance from fingertip to fingertip when your hands are stretched out.
1. Find Your Personal Fathom
A. Stand with your hands outstretched. Ask a friend, teacher, or parent to help you measure your fathom with a piece of string or ribbon. Cut the ribbon/string to match the length from fingertip to fingertip.
B. Measure the length of the string/ribbon using a ruler or yardstick to find the length of your personal fathom.
C. Is your personal fathom shorter or longer than 6 feet?
2. Converting Feet To Fathoms
The TS Kennedy is bound for Mayaguez, Puerto Rico where the TS Kennedy will conduct anchor drills. The Puerto Rico Trench is located on the boundary between the Caribbean Sea and the Atlantic Ocean. Its depth is 8,648 feet.
A. What is the depth of the Puerto Rico Trench when expressed in fathoms? Use the Conversion Table below. Be sure to show and label your work. Explain the steps you followed to arrive at your answer.
B. What is the depth of the Puerto Rico Trench when expressed in cable lengths and fathoms? Use the Conversion Table below. Be sure to show and label your work. Explain the steps you followed to arrive at your answer.
1 fathom = 6 feet
100 fathoms = 1 cable length
10 cables length = 1 nautical mile
1 nautical mile = 1.151 statute miles (length of a minute of longitude at equator)
3 nautical miles = 1 league
1 knot = 1 nautical mile per hour = 1.151 statute miles per hour
10 chains = 1 furlong = 201.17 meters
60 nautical miles = 1 degree of a great circle of earth (latitude)
1 statute mile = 5280 feet
1 nautical mile = 6,076 feet
The TS Kennedy encountered some windy weather after departing Buzzards Bay. These dice games will help you learn about the Beaufort Wind Scale while polishing your mathematics skills.
3. Beaufort Wind Scale Matching Game
4. Beaufort Wind Scale Multiplication Facts Game