Henry Darke's first drama for radio tells the story of Jay, a rookie observer on a deep sea trawler. He must ensure adherence to the strict international laws covering fishing quotas, sustainability and safety. It's a time when you need to know who your friends are. Jay ..... Matthew Aubrey Kim-Long ..... Chike Chan Kate ..... Sarah Ovens Esther ..... Franchi Webb Carlitos ..... Joseph Balderrama Juan/Radio Operator ..... Simon Scardifield Dad ..... Kenny Blyth Lecturer ..... Michael Bertenshaw Sisco/Lazrus ..... Richie Campbell Directed by Gemma Jenkins Longline was a Radio 4 production.