Fishing and Gear Technology

Unit 12 - Purse seine design

12.11.Deck Equipment

12.11.3.Others

Windlass:- This is a special type of winch used for handling anchor chain and rope.

Power blocks:- These are used in purse seining and gill netting. It is a labour saving device. The purse seine power block is so designed as to pass the bundles of webbing, corks, weights and rings through the sheaves during hauling operation. It is a self powered free swinging “V” shaped sheave made of cast aluminum along with zinc and it is hydraulically driven.

Triplex: - It is a net winch used in purse seiners instead of power blocks for hauling large nets without damage. It consists of three hydraulically driven rollers fixed parallel to each other on independent shaft and adjacent rollers rotate in the opposite direction.

Line hauler:- Line haulers are used for heaving lines. Capstan and line haulers are similar in many aspects. Line haulers or gurdies are used in hauling the trolling lines, long lines, jigging lines and tuna long lines.