A report on the research to find a replacement for the Holmes Wright B (HWB) lantern test,
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Seafarers must have their colour vision tested so that we can be sure that they can carry out their work safely. The MCA follows international conventions and uses the Ishihara test for the first screen. Those who fail can have a further test, which in those with navigational look-out duties is the Holmes Wright B (HWB) lantern. As the HWB is no longer made, MCA commissioned research to find a different test. The MCA is looking at the results of the report (below) and deciding how to act on them. If you have any comments on the report, please email… Seafarer.S&H@mcga.gov.uk.