Being colourblind shouldn’t make a difference though, you can only have colourblindness that:
1) Makes red and green look the same
2) Makes blue and yellow look the same
I know there are blue and yellow wires but the yellow wires have a green stripe.
Fair point. But this is on boats, so all bets are off. You'd be shocked to find there's bad electrics on boats. badum tish.
I thought an eye test for electricians was standard, but the sasanach look at me funny when I say that. It might just be an Irish thing.