Assuming all ships are of one class each 600 ft long, the distance between lines should be at least 1425 ft (say, 2½ cables).
Ucingela okokuba iinqanawa zonke zikudidi olunye nganye ine600 yeenyawo ubude, umgama phakathi kwemigca kufuneka noko ube kwi1 425 yeenyawo (itsho 21/2 yentsontelo).