Swinging Circle Calculator
Make sure the area around your vessel is free from obstructions by finding your swinging circle while at anchor.
Anchor Scope and Chain Length Calculator
Enter two fields only to find the third value. For example, if you want to know how many shackles you want to use, enter your desired anchor scope and the depth of water. Press “Calculate” and you should have your answer.
Arc to Time Converter
Easily convert arc to time with this simple formula.
Time to Arc Converter
Find the arc equivalent of any given time using this calculator.