What do we need for measuring
remember that all calculations can be used on any in the length rigged vessel
For example we need to make a sail or suit of sails for a Smack.
Equipment needed is, writing implement(pencil), paper ( small tablet is preferred since other notes may be written) a folding ruler,
at least 40 meters of good rope from 6 to 8 mil. Stretch free,
a nice day and a clear head.