1. An alarm relay in a navigational light circuit is connected in parallel with the navigation lights.
True. An alarm relay in a navigational light circuit is typically connected in parallel with the navigation lights. This allows the alarm relay to be activated if any of the navigation lights fail.
2. In the event of failure of a navigation light, the alarm relay gets activated.
In the event of a navigation light failure, the alarm relay gets activated. This alarm alerts the crew to the failure and ensures that immediate action can be taken to rectify the issue and maintain the required safety standards.
3. The occurrence of a short circuit in navigational lights is protected by a circuit breaker or fuse.
The occurrence of a short circuit in navigational lights is protected by a circuit breaker or fuse. These protective devices are installed in the electrical circuit to interrupt the flow of current in case of a short circuit, preventing damage to the lights and the electrical system.
4. List the various Navigation Lights required on board a ship.
The various navigation lights required on board a ship include:
- Masthead light: Located at the highest point on the ship's mast or superstructure, it is visible from the front and sides of the ship.
- Sidelights (Port and Starboard lights): The port side light is red, and the starboard side light is green. These lights are mounted on the ship's sides and are visible from the front and side.
- Sternlight: Located at the stern (rear) of the ship, it is visible from the back and sides.
- All-round white light: This light is visible from all directions and is generally used as an additional or substitute light during certain maneuvers or when the other navigation lights are not visible.
It is important to note that the specific requirements for navigation lights may vary depending on the vessel's size, type, and operating area. International and local regulations should be consulted for the exact requirements.
5. List of Signals for a Power-driven Ship Under Way (At Night)
The signals for a power-driven ship underway at night include:
- When underway, a power-driven ship displays masthead lights, sidelights, and sternlight.
- A power-driven ship, while overtaking another vessel, signals this intention by displaying a white light at the stern, in addition to the masthead light, sidelights, and sternlight.
- When making way through the water, a power-driven ship displays only the masthead light and sidelights.
- If the power-driven ship is not making way through the water, it will display only the all-round white light.
These signals are crucial for other vessels to determine the course and intentions of a power-driven ship at night, helping to prevent collisions and ensure safe navigation.
