zavisi od kompanije i od pozicije. Po zakonu moras imati kolorni vid dovoljan za obavljanje duznosti (izuzetak su osoblje DECK i ENGINE departmana). Bitno je da dobijes FIT na lekarskom i mozes plovit.
Evo i sta "zakon" kaze za to. (MCA- Britanski zakoni, vecina cruise kompanija se pridrzava toga ili US Coast Guard pravila)
http://www.dft.gov.uk/mca/msn_1822.pdfCOLOUR VISION Deck officers and ratings - Colour vision should be tested by the Approved Doctor with Ishihara plates, using the
introductory plate, and all the transformation and vanishing plates. Those used should be recorded on the medical
report form (ENG 2). Candidates who fail the Ishihara colour plate test may apply to one of the MCA’s nominated
Marine Offices listed at Annex C to this MSN, for their colour vision to be re-tested using a Holmes Wright B
lantern.
Engineer and radio department personnel should have their colour vision tested by the Approved Doctor using
Ishihara plates (as for deck department). Those who fail the Ishihara test may apply to any registered optician for
confirmatory testing using the Farnsworth D15 test or City University test.
In all cases where a follow-up test has been undertaken, a report showing the result must be returned to the
Approved Doctor, on the basis of which he/she will decide whether it is appropriate to fail the candidate or issue a
full or restricted medical certificate, reflecting the duties the seafarer will be required to undertake.
Any decision relating to subsequent colour vision testing should be officially recorded by the Marine Office or
optometrist and retained by the seafarer with the ENG 1 to avoid the necessity for repeated secondary testing.
Other personnel should be tested for colour vision, where relevant for the duties to be undertaken, using the
Ishihara plates.Sto se US COAST GUARD pravila tice, malo su strozi, al opet za obicne pozicije se zahteva samo da prodjes lekarski sa odredjenim standardima za kolorni vid.
vise informacija
http://www.uscg.mil/nmc/credentials/forms/medical/cg719k.pdf 
