Port....

and Starboard!!!!!!!!! 
 And no im not navel.  i could never remembewhich way round the colours were until a chap( who went to Wray castle when it was  a training college for Merchant Navy radio officers based at Wray Castle (   Beatrix Potter, spent a summer holiday there when she was 16 in 1882. ) ) said u just have to ask   "Is there any red port left in the bottle ?