May 7th, 2010 
molitva leyli 1. Luring Light and schooling information by working boat
After fish school confirmation, 2 working boat are launched and saile to Payao (drifting Fish Aggregating Device – FAD, rumpon, unjang). One the working boats is fixed at Payao with a 2000 watt under water lamp. The other is tight and handled the light boat. Purse seiner can obeserve fish school below the Payao by echo trace, transmited by both of working boats. One of working boat will survey around drifting object (FAD), if fish school does not stay bellow the drifting object. Period for luring light is 20-30 minutes.
2. Shooting Operation
Before start shooting operation, master fisherman gather oll information of current weather and fish school. The important parameters of purse seine operation are as follow;
1. Fish school is large enough for fishing
2. The current between upper layer and lower layer, uper and mid layer, should be les than 1.0 knots.
3. The individual current layer should be lower than 1 knot
4. The wind speed is less than 15 m/s
5. Payao drifting speed should be less than 1.5 knots
6. The weather condition should be clear after start shooting for few hours of operation
If the fishing parameters are suitable and safety for conduct the operation, the ship is approached to the target. At distance about 1500 m, two radars are transmitted to check the reference range of to working boat positions. Low frequency sonar, 28 kHz, should detect the fish school at range 1000 – 1200 m. The other medium frequency, 94 kHz, shoud detect the fish school at range 500 – 600 m. The ship accelerated up to 7-9 knots. The suitable distance between ship and target was 200 – 250 m. Master fisherman ordered to discharge skiff boat from the slip way when purse seiner is at suitable shooting direction.
After releasing the skiff boat was slipped from th slip way eith the purse seine net the skiff boat hard turned to starboard side. Purse seine net is discarged into the sea and purse wire is paid out ouf purse winch. Whole purse seine net always dischargeds from net space af purse seiner before complete net circle 100-200 m.
3. Pursing of purse line and towing warp
When the shooting circle is completed and purse seiner reaches skiff boat, the skiff boat sends a guidance line wich connect to the purse line and bunt end rope to the crew at the purse seine winch. Purse line hauling is carefully adjusted length by purse winch controle console soth that all purse rings are located at the center piece of purse line. The purse line hauling spends the time 25-30 minutes and finishes when all rings are hung at the purse davit block. Towing line is hauled by rear drum of purse winch till reaches the roller at the bulwark near net space. Bunt end rope is hauled bay bariling winch and secure at the base of purse davit.
4. Ring Transfer
After all rings are hung at the purse davit, crew attach 2 cramps at each end of purse winch. Double winch with hook controled by main control console heaves all rings up and transfers them to hang at ring stripper
5. Net Hauling
Net hauling is start after all purse rings is hung at the ring striper and payao (FAD) is removed aways from net circle. Purse siene net is haulec by power block with grip into the net space. To adjust net hauling performance and location of purse seiner, skiff boat will tow the purse seiner by using skiff towing line. Angel of towing line is adjusted by skiff adjusting winch. During net hauling, direction of stern deck was against the wind when crews haul the net. Two working boats adjust the circle of net and tow the float line to the stern deck of purse seiner, to reduce the load of power block during hauling operation. Net hauling is conducted until reach the bunt net.
Crew Arrangement
“Fishing Operation” Shoutheast Asian Fisheries Development Center
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