The Seaman's daily assistant, being a short, easy, and plain method of keeping a journal at sea ; in which are contained, rules shewing how the allowances for leeway, variation, heave of the sea, set of currents, &c. are to be made ; and to correct the dead-reckoning by an observation, in all cases: and also all the tables that are any ways necessary for the seaman's use in keeping a journal
Haselden Thomas | printed for J. Mount T. Page and W. Mount | 1777