According to the problem of position discontinuity using GPS in city cars, a scheme that GPS is combined with DR which is composed by piezoelectric gyro and milemeter is put forward.
So that to this hunter's wondrous skill, the proverbial evanescence of a thing writ in water, a wake, is to all desired purposes well nigh as reliable as the steadfast land.
On the whole we deemed it the better course to lie where we were, until within an hour or so of the steamer's time, and then to get out in her track, and drift easily with the tide.