Green buoy floating on the blue waters of the Ionian Sea, with the coast of Greece in the background

green buoy floating ionian sea maritime scene navigational aid sea marker coastal view nautical equipment oceanic waters buoyancy maritime safety ocean exploration marine environment waterborne marker marine signaling buoyant object nautical ambiance sea safety marine landmarks waterway indicator coastal adventure navigational tool maritime navigation oceanic landscape marine safety buoyant marker water safety nautical scene sea adventure waterway marker coastal beauty ocean navigation maritime equipment coastal exploration nautical landmark oceanic environment 4k slowmo slowmotion 60fps journey trip