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Ships at Sea Trigonometry Angles of depression The diagram shows a cliff 120 metres high. From the top of the cliff, the angles of depression of two ships at sea are 38° and 53° respectively. horizontal 38° 53° 120m ■ Ship1 C L I F F ■ Ship2 Sea Use trigonometry to find the distance between the two ships. Repeat the previous calculations to find the distance between the ships in the examples below. Height of the cliff (metres) Angles of depression of the two ships 127 22° and 34° 176 26° and 32° 216 18° and 28° 150 27° and 38° 133 20° and 30°