Jersey ran in three first-half tries to set the platform for a narrow victory over Cornish Pirates, who remain without a Championship win this season.
Winger Tom Pincus went over twice early on before the visitors hit back through Pete Laverick's try.
Ex-Perpignan prop Roy Godfrey touched down in the corner to re-open the Reds' advantage just before the break.
Pirates could not find a way back, as Laurence May's penalty proved to be the only score of the second half.
The game was always likely to be a close one, with Jersey heading into the match on the back of a two-point loss to Doncaster and a one-point win over Hartpury, while the Cornish outfit had suffered narrow losses to Ealing and Bristol.
The visitors were not helped by flight delays and only arrived on the island just over an hour before the scheduled kick-off time, while the Reds also had a difficult build-up losing captain Scott van Breda to injury in the warm-up.
Kick-off was put back 15 minutes after the travel problems, and Jersey started brightly with Pincus opening the scoring after seven minutes when he was found wide on the right, before he darted through the defence for his second of the night.
At the other end, a clever spin from Pirates skipper Nicolas de Battista set up fellow centre Laverick to ease in by the posts to reduce the deficit.
Stand-in Jersey captain Godfrey touched down in the corner just before half-time though, and Brendan Cope superbly converted to re-establish the nine-point lead for the hosts.
But Jersey struggled to find so much fluidity after the break and Pirates twice went close to scoring a potentially match-winning try, only to knock-on metres from the line on both occasions.
Jersey: Worrall; Pincus, Best, Ma'afu, Abrahams; Cope, Hardy; Godfrey, Saunders, Armstrong, Voss, Sexton, Rogerson, Joyce, Pitman.
Replacements: Woolmore, Selway, Atalifo, McKern, Argyle, Dudley, Bryant.
Cornish Pirates: May; O'Meara, Laverick, De Battista (capt), Moyle; May, Day; Walker, Cowan-Dickie, Andrew, Caulfield, Freeman, Cooper, Bolwell, Lawday.
Replacements: Judge, Keast, Lee, Duncan, Pope, Cargill, Koster.
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