New codes of practice to improve the safety of Devon and Cornwall's fishermen come into force today.
They include holding monthly emergency drills, life rafts for some boats, fitting of radar reflector alarms and carrying personal locator beacons with built-in GPS.
The Maritime & Coastguard Agency says the code had been drawn up after speaking to people connected with the industry to reduce the risk of serious accidents and deaths.
Maxine Prowse has campaigned for fishermen to have life jackets fitted with trackers for years. Her son Robert was one of the victims of the Purbeck Isle Tragedy off Weymouth in 2012. He was not wearing a life jacket at the time and his body has never been recovered.
The personal locator beacons don't just save fishermen's lives - divers are also advised to wear them. A scuba diver who went missing off the south coast of Cornwall in 2015 was saved thanks to his 'PLB'.