The cost of the cable before laying depends on the dimensions of its core, the gutta-percha, which still forms the only trustworthy insulator known, constituting the principal item of the expense; for an Atlantic cable of the most approved construction the cost may be taken at f250 to £300 per nautical mile.
The different coils are prevented from adhering by a coating of whitewash, and the end of each nautical mile is carefully marked for future reference.
A mean degree of the meridian being assumed to be 69-09 statute miles of 5280 ft., the nautical mile (A l b - degree) is taken as 6080 ft., which is a sufficiently close approximation for practical purposes, and the distances between the knots are made to bear the same relation to 6080 ft.
Knowing the different considerations for a cruise passenger's wardrobe as well as what extras may be needed can help travelers plan not only how to pack, but how to look fabulous along every nautical mile.