IT'S steady as she goes at James Fisher. The leading provider of specialist marine services firmed 2 1/2p more to 137 1/2p after the wife of Ian Serjent, marine and technical services director, bought 10,000 shares at 137p. This follows other director purchases in March. Fisher has benefited from the effects of new tax breaks for UK-registered ship operators, while the disposal of its loss-making dry cargo business was applauded.