Swinging Circle Calculator

Finding your swinging circle given your ship's length and the number of shackles used.

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

A converter/ calculator for finding the scope of the anchor, length of chain, and/ or water depth depending on two given values.

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

Converting Arc in degrees, minutes, and seconds to Time in hours, minutes, and seconds.

Easily convert arc to time with this simple formula.

Time to Arc Converter

Converter of time in hours minutes and seconds to its equivalent Arc in degrees, minutes, and seconds.

Find the arc equivalent of any given time using this calculator.