Before deck cargo is loaded on top of hatch covers on a General Cargo vessel, it must be checked that:

The ship must be on an even keel.

The hatch covers are fully secured to a sea going condition.

The deck cranes must always be stowed into sea going position.

The ventilators should be opened.

I don't know

The deck cargo is properly secured and cannot shift during transit.

Before deck cargo is loaded on top of hatch covers on a General Cargo vessel, the following checks should be carried out:

1. Ensure that the ship is on an even keel. This means that the vessel should be leveled so that it is not listing to one side. This is important to ensure stability during cargo operations.

2. Verify that the hatch covers are fully secured to a sea-going condition. This means that the hatch covers should be properly closed and tightly sealed to prevent any water ingress during the loading process.

3. Confirm that the deck cranes are stowed into a sea-going position. This means that the cranes should be properly secured and positioned ready for sea passage, with booms and jibs stowed appropriately to avoid any interference with the loading of cargo on the deck.

4. Check if the ventilators should be opened. Ventilators are used to provide air circulation and ventilation to the cargo holds. Depending on the cargo being loaded, it may be necessary to open the ventilators to ensure proper ventilation and prevent any accumulation of gases or condensation inside the holds.

By conducting these checks, the vessel can ensure the safety and integrity of the cargo, as well as maintain the stability and seaworthiness of the ship.

To determine the correct answer, let's go through each requirement one by one:

1. The ship must be on an even keel: When a ship is on an even keel, it means that it is perfectly level with the waterline. This is important before loading deck cargo because if the ship is not level, it can create stability issues and potentially lead to cargo shifting, which can be dangerous. To determine if the ship is on an even keel, you can use a leveling or inclinometer device to ensure that the ship's trim and heel are within acceptable limits.

2. The hatch covers are fully secured to a sea-going condition: Hatch covers are used to seal the cargo holds and prevent water from entering. Before loading deck cargo, it is essential to ensure that the hatch covers are properly closed, secured, and capable of withstanding the ocean's conditions, referred to as being in a "sea-going condition." This often involves checking the hatch cover locking mechanisms, rubber gaskets, and inspection of any securing devices such as securing pins or twistlocks.

3. The deck cranes must always be stowed into sea-going position: Deck cranes are used for lifting and moving cargo on and off the ship. However, when deck cargo is loaded, it is important to stow, or secure, the cranes in a sea-going position. This typically means positioning the cranes in a locked and secured state, often with their jibs (arms) lowered and weights balanced to ensure stability during the voyage. This ensures that the cranes do not interfere with the safe stowage or shifting of deck cargo, reducing the risk of accidents or damage.

4. The ventilators should be opened: Ventilators are used to provide ventilation to closed spaces within the ship, including cargo holds. However, before loading deck cargo, it is generally recommended to open the ventilators to allow for better airflow and reduce the risk of potential accumulation of gases or odors. By opening the ventilators, any potentially hazardous or volatile substances can be properly vented, ensuring the safety of the crew and the cargo.

Based on the given options and explanations, the correct statement would be that before deck cargo is loaded on top of hatch covers on a General Cargo vessel, the ventilators should be opened.