All seagoing ships must be equipped with running and signal lights in compliance with the International Regulations for Preventing Collision at Sea (COLREG). A navigational light panel is installed in the wheelhouse for the control of all running and signal lights.
- Running lights – Sidelight starboard and port, masthead forward and aft, stern light.
- Signal lights – Anchor forward and aft, not-under-command, towing lights, hampered vessel, flashing lights for hovercrafts.
- All-round light – A light showing an unbroken light over an arc of the horizon of 360 degrees.
- Flashing light – A light flashing at regular intervals at the frequency of 120 flashes or more per minute.
- Masthead light – A white light placed over the fore and aft centreline of the vessel showing an unbroken light over an arc of the horizon of 225 degrees and so fixed as to show the light from right ahead to 22.5 degrees abaft the beam on either side of the vessel.
- Sidelights – A green light on the starboard side and a red light on the port side each showing an unbroken light over an arc of the horizon of 112.5 degrees and so fixed as to show the light from right ahead to 22.5 degrees abaft the beam on its respective side.
- Sternlight – A white light placed as nearly as practicable at the stern showing an unbroken light over an arc of the horizon of 135 degrees and so fixed as to show the light 67.5 degrees from right aft on each side of the vessel.
- Towing light – A yellow light of the same characteristics as the sternlight.
