lihtne tõsteseade, kraana eelkäija. Koosnesid kahest pikast ülalt kokku seotud palgist, mida trossi abil hoiti kaldasendis ja mille tipust rippus alla tali. Sakse rakend. nt. mastide ja kliiverpoomi kohaletõstmiseks purjelaeva ehitamisel, tali lööpri pingutamiseks kasut. siis laeva ankrupeli.
a hoisting and loading device consisting of two poles secured together at the top, with a block and tackle, and spread apart at their feet, which when tilted can be used as a boom to raise loads
... "floating equipment" means any floating structure carrying mechanical installations and intended for work on waterways or in ports (e.g. a dredger, elevator, sheer-legs or crane) ...
