In article ,
Dave Stanton wrote:
The Navy gives you a free colour blindness test if you wasnt to be a
electrician on board ship. You don't get trained if you are !!!

At one time colour vision was pretty important for all pro sailors - being
able to distinguish between distant red and green lights. They tested
peripheral vision for this at one time if you wanted to join the merchant
navy. A school pal tried and failed.

--
*Marriage changes passion - suddenly you're in bed with a relative*

Dave Plowman London SW
To e-mail, change noise into sound.