Swedish owner Rederi AB Gotland has logged a dip in annual earnings as its tax bill rose.

The product tanker, ro-pax and wind farm service vessel group said net profit last year was SEK 324m ($38.7m), against SEK 343m in 2016.

Revenue rose to SEK 2.41bn, from SEK 2.11bn the year before.

Operating costs were higher at SEK 621m, compared to SEK 486m, but operating earnings were still ahead, at SEK 551m versus SEK 418m.