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Hook-up response for trawlers
A hook-up is potentially one of the most dangerous situations on a trawler. A trawler can easily roll over with crew becoming trapped underneath and drowning. Circumstances can differ each time a trawler hooks-up—usually a mix of sea conditions, trawler stability and crew actions. Each crew member needs to understand that a practiced and considered set of actions is the best response. Your life may depend on it.
To give yourself the best chance of recovering from a hook-up, it is important to ensure that your trawler is properly prepared for a hook-up before you leave port.
Mark Millward is an experienced Queensland prawn and scallop trawl fisherman who has built trawlers using his practical understanding of vessel stability factors important to trawling. In the video below, Mark explains precisely how to prepare a trawler in port so that it is best ready to help achieve recovery from a hook-up. He then explains the different types of hook-ups such as mud, shale and rock, that can occur in trawling and the steps needed to respond and recover from each type of hook-up.
Hook-ups are not unique to prawn/scallop trawling and can be a danger in other bottom trawl fisheries.
Below are some general tips to address trawler hook-ups. Masters and crew of fishing vessels trawling the seabed should familiarise themselves with these and include a hook-up plan for your vessel in the emergency response procedures in your vessel’s safety management system.
What to do if you're in a hook-up situation
1. Reduce power
- the bow of the trawler is facing the prevailing conditions, and/or
- the snagged wire is as close as possible to the stern—but do not allow the wire to pass midway behind the stern toward the other side of the trawler
2. All crew on deck and close hatches
3. Alert other vessels in the area
4. Lifesaving equipment in float free position
5. Move trawl cables to the side of the vessel
To minimise the likelihood of a rollover the lever effect must be kept to a minimum. The skipper is ultimately responsible for the vessel and all persons on board and should stop and think about their response—allowing a few moments (or minutes) to consider the prevailing tide and sea conditions—before giving instructions.
Depending on your set-up, once the trawler is over the hook-up site, and sea conditions are suitable, both trawl wires should be moved to the side or stern of the trawler before any pressure—over and above normal trawl wire pressure—is applied through the winch. When winching, do not stand anywhere between the winch and the nets and stay well clear of pulleys or wires. If a pulley or shackle fails you could end up with severe injuries if the wire makes contact with your body.
6. Be ready to cut the trawl wires
While recovering the snagged net, if you are unable to keep the snagged trawl wire over or beside the stern or directly forward of the bow you may have reached the point of no return. Put the trawler in neutral and cut the snagged wire. If you have time, and conditions permit, attach a marker buoy to the trawl wire before cutting it loose.
7. Move to high side of the vessel
When a trawler hook-up occurs
You need to understand a few basic principles when a trawler hook-up occurs.
This is nearly always stated in emergency response procedures and for good reason—because people who don’t know what to do nearly always panic. If you practice and time your emergency response—for example, getting all safety equipment in the float free position—you are less likely to panic when the real situation arrives.
A few drills could save you in an emergency situation.
Contain the situation
Always think about how you can prevent a hook-up situation from getting worse. Trawlers have rolled-over following an hour of unsuccessful attempts to recover gear so before the next hook-up, discuss the what, how, why and when of a hook-up response with your skipper or other operators.
Have a plan
Prepare the wheelhouse and forecastle so that you and other crew can get out if the trawler is upside down. Ask other deckies and skippers about how they might get out of a trawler that has rolled over.
While the best answer will always be, ‘when you hook-up, get out of the wheelhouse’ understand what it means to get trapped under the water and how to improve your chances of survival.
Owners must ensure the skipper is familiar with the characteristics of the trawler including stability, freeboard, loading, maintenance and water integrity.
The skipper must ensure that crew are properly informed about safety issues and trained to respond to different emergency or high risk situations. This includes emergency drills to ensure crew understand their respective roles, where the equipment is stored, how lifejackets are worn and how each piece of safety equipment is operated.
Crew have an obligation to know what is required of them while on board and participate fully in regular emergency response drills. If there is something a crew member does not understand, it is important they ask for advice or help from the skipper.
Practice your response time
The most experienced skippers and crew can be in a ‘ready to winch position’ in less than 20 seconds. That is, steps 1 to 4 on the hook-up procedure are complete. They have reached this level of efficiency through many ‘live’ hook-up situations.
Take the time to practice the response with new crew and don’t stop practising until you consistently achieve the ‘ready to winch position’ in less than 20 seconds.
A well-rehearsed crew could save the life of everyone on board. Take a few minutes each day to prepare yourself and especially new crew. When you are confident the crew is prepared, conduct random checks to maintain the minimum 20 second response time.
Be aware that maintaining the trawler in an upright position is the most important task during a hook-up. If the wind, tidal conditions and trawler are all running in the same direction when a hook-up occurs, your chances of a rollover have increased on what they would have been if you were travelling against the wind and tide. The speed with which you respond is critical. If the hook-up site moves from behind to beside the trawler, depending on the sea and tidal conditions, you are in an extremely dangerous situation.
Make sure the trawler always has the capacity to manoeuvre so that a snagged wire can be brought behind the stern.
Alternatively, you could fix the trawl wire to the anchor point at the front of the trawler and allow the tide and swell to work the net free. If you are unable to control the position of the wire or vessel, you may have reached a point of no return and should be prepared to cut the wire.
If you realise this early you should have enough time to put the trawler in neutral, buoy the wire, then cut it. Don’t push the trawler past the point of no return— especially if the decision to push the trawler is made by someone not on the trawler. No life is worth less than a set of trawl gear.
Secure loose equipment
An unsecured cooker, fridge or computer in the wheelhouse or a gas bottle on the deck can knock you unconscious in a split second.
A fire extinguisher is often kept at eye level within the wheelhouse but can quickly turn into a dangerous weapon if not properly secured.
If you want to improve your chances of survival in a rollover, secure all heavy items so they don’t become a flying object when you are already struggling with disorientation from being upside down. You should also wear a lifejacket to increase your chances of survival if you do get hit by an object.
What to do after a hook-up
Learn from past mistakes and correct any problems as soon as possible after the event—while it is still fresh in everyone’s mind.
It will also help prepare you for the next hook-up and improve your chances of staying upright should the circumstances be worse next time round.