Question 38 MODU03 - Ballast Control Operator

The Correct Answer is B. ### Why Option B (10) is Correct VHF Channel 16 is the international distress, safety, and calling channel. Regulations require that initial contact be brief and that vessels immediately switch to a suitable working channel for routine communications to keep Channel 16 clear for emergencies and initial calls. Channel 10 (or sometimes Channel 8, 9, or 12, depending on regional rules and traffic density) is designated as an **inter-ship working channel**. In many operational areas, particularly those involving commercial marine traffic, crew boats, and offshore rigs, Channel 10 is the preferred primary working channel for routine communication between vessels and coastal stations (like an offshore rig radio watch) after initial contact is made on Channel 16. ### Why the Other Options Are Incorrect **A) 6:** Channel 6 is primarily reserved for **inter-ship safety communication** and communication related to navigation (ship-to-ship maneuvering). While it is a working channel, it is generally preferred to use Channels 8, 10, or 12 for routine vessel-to-shore (rig) business communication. **C) 12:** Channel 12 is often designated as a **port operations** channel or a vessel traffic services (VTS) channel in certain areas. While it can be used for ship-to-shore communications, it is typically reserved for communications with harbor authorities or within specific port areas, making Channel 10 a more standard choice for general offshore rig-to-crew boat communication. **D) 14:** Channel 14, like Channel 12, is commonly designated as a **port operations** or VTS channel, and its use is typically confined to specific regulated port areas or communication with Vessel Traffic Services. It is not the standard working channel requested for routine communication with an offshore rig outside of these regulated zones.