Question 28 MODU03 - Ballast Control Operator

The Correct Answer is A. **Explanation for Option A (regular checks of bilge levels):** Totally enclosed survival craft (lifeboats) that have been afloat for an extended period, particularly after being launched from MODUs (Mobile Offshore Drilling Units), are subject to various conditions that can lead to water ingress. The survival craft might sustain minor damage during launch or while maneuvering in heavy seas, leading to leaks, or water may enter through seals and glands over time. Regular checks of the bilge levels are crucial to ensure that any accumulation of water is promptly identified and pumped out. Excessive bilge water can compromise the stability of the craft, damage essential equipment (like batteries or electrical components), and reduce the freeboard, making the craft vulnerable, especially if recovery is delayed. This maintenance check is a fundamental requirement for maintaining the seaworthiness of any small vessel afloat for a long duration. **Why other options are incorrect:** * **B) frequent flushing of the water spray system with fresh water:** The water spray system (used for fire protection and cooling when passing through burning oil) typically uses seawater. While maintenance might require flushing with fresh water ashore to prevent corrosion or blockages, performing this frequently while the craft is adrift and conserving limited fresh water supplies is impractical and unnecessary for immediate operational safety. * **C) use of ear plugs to dampen engine noise:** While enclosed survival craft engines can be noisy, the operational requirement is safety and functionality, not crew comfort. Survival craft are designed to be operated even without dampening engine noise, and requiring ear plugs is not a standard, critical safety or maintenance procedure necessary to keep the craft afloat and functioning over a long period. * **D) frequent opening of hatches to permit entry of fresh air:** Totally enclosed survival craft rely on dedicated ventilation systems (either natural or powered) to maintain adequate air quality and prevent heat buildup. Opening hatches frequently is hazardous, especially in rough seas, as it allows ingress of water (potentially swamping the craft) and compromises the sealed environment necessary for fire protection or protection against toxic fumes. Hatches are kept closed unless docking or embarking/disembarking.