USEFUL MARINE STOFF:
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Green can odd / Red nun even
"Red right returning"
1 knot = 1.15 stat. mile per hour
1 fathom = 6 feet
1 gallon sea water = 8.5 pounds
2 inch hole 30 inches below waterline = 40 gallons per minute
Portland Head FL 4s 101ft 24M
Portland Harbor Pilot VHF 11
Portland Maine to Key West Florida = 1387 nautical miles
The Tide Rule of Twelfths: 6/12 of tide range between 3rd to end of 4th hour
New or full moon 15 to 20 percent increase in tide current speed
