OK - so what is a rutter? Some sort of aquatic mammal? A device for helmsmen with a speech impediment? I know that when I defeat an enemy at sea (a rare occurence - if God meant us to sail on the sea he'd have given us waterproofing) I steal one of them and get to see my enemy's world map. Chambers English and the Oxford Concise dictionaries are unencumbered by references to these beasts.
Do tell.
Do tell.