Whilst conducting aerobatic manoeuvres, the chances of a pilot becoming disorientated are increased. Therefore, it is vital that the pilot is able to maintain visual references related to the dominant features of the landscape around the aircraft. The absence of dominant features over water would increase the chances of a pilot misjudging the attitude of the aircraft. In addition, the visibility conditions over the sea often make it difficult for a pilot to discern the horizon, thus enhancing the possibility of the pilot becoming disorientated. Consequently, aerobatic manoeuvres are not routinely conducted over the sea.