trålöppnare

Trålöppnare, also known as trawl doors or trawl doorsets, are devices used in commercial fishing to open and close the mouth of a trawl net. These doors are typically made of steel and are designed to be strong and durable, capable of withstanding the harsh conditions of the open sea. The trawl doors are attached to the trawl net and are opened and closed by a series of cables and pulleys, which are operated by the crew on the fishing vessel.

The primary purpose of trawl doors is to control the opening and closing of the trawl net, allowing fish to enter the net while preventing them from escaping. This is achieved by opening the doors at the desired depth and closing them once the desired catch has been made. The doors are also used to prevent bycatch, which is the unintentional capture of non-target species.

Trawl doors are an essential component of modern commercial fishing, enabling efficient and sustainable fishing practices. They are used in a variety of fishing methods, including bottom trawling, midwater trawling, and pelagic trawling. The design and operation of trawl doors can vary depending on the specific fishing method and the type of fish being targeted. Despite their importance, trawl doors are often overlooked in discussions about fishing gear, with more attention typically given to the trawl nets themselves. However, the effective operation of trawl doors is crucial for the success of any fishing operation.