Landing areas should be as large as possible and set out
                           to provide safe access for helicopters from the ship's side. Due account
                           must be taken of possible helicopter slippage and wind and ship movement.
                           Where the boundary of the clear zone is close to or in line with the
                           ship's side, and where the height of fixed obstructions so permits
                           (see 
                           2.2.7 below),
                           helicopter safety will be improved by extending the clear and manoeuvring
                           zones to the ship's side symmetrically, thereby widening the approach
                           to the landing area (see 
                           figure
                              1). This extended landing area at the ship's side is therefore
                           the preferred operating area.