This was largely guesswork, but I approximated distances and made the situation fairly clear.

When I had completed the explanation, and stood before them awaiting decision, it was Haines who acted as their spokesman.
"This yere is Cape Howarth ?" he asked, a grimy thumb on the point indicated.

"An' yer say it's 'bout a hundred and fifty miles west ?" "Yes, about that." "An' thar's no settlement ?" "Some colonists fifty miles north is all." "That's 'bout right." He turned to the others.

"Say mates, this is how I figure.

We can't go on no long cruise with all those bloody rats in the hold.