This is my entry for the 'Primary colors - RGB' contest.

Depicted are self providing sea lane buoys.The electricity for the lamp on top of the buoy and the horn of the buoy is provided by a solar cell panel charged battery (the first for shining the lamp in nightly conditions and the latter for the sound of a horn in case of foggy conditions). Each buoy is provided with a radar reflector too to make it better visible on radar. For 'stationkeeping' they are anchored at their intended spot at sea.

These buoys play a major safety role in maritime traffic.

In order to continue this role in a proper way they will be tested and are in need from maintenance from time to time. Therefore they are stored now on shore at a square just in front of the maintenance work place.

Obviously, they have been replaced by a 'stand in' when 'parked' on the shore.