Catenary Calculator
Set chain length, water depth, chain size and force. The curve view shows seabed contact when force is below lift-off force.
Chain Curve
Distance from anchor (x) vs chain height above seabed (y).
Horizontal Force to Just Lift Last Link at 20+2d Scope
Force required to just lift the last chain link off the seabed when using the recommended scope (20m + 2 × depth), for each chain size. Note the minimum around 10-12m — deeper anchoring with more chain needs less force to lift the last link.
Chain Length and Scope vs Water Depth (when last link is just lifted)
Red line: chain length. Blue line: scope ratio.