It must be appreciated that this method is not completely accurate as no account can be made for the movement of the craft and therefore the true height of eye of the observer, the effect of swell action, or atmospheric conditions.
Kufuneka ithakazelelwe okanye ivunyelwe into yokuba le ndlela ayithanga ngqo ngokupheleleyo kangangokuba akukho nto inokucaciswa ngokuhamba kwenqanawa kwaye nobude obuyinyani bombukeli, nokuhamba kancinci kolwandle okanye imimoya engemihle.