How long do you have to release a UMIB or MARB of initial notification?

• A. 15 Minutes
• B. 5 Minutes
• C. 30 Minutes
• D. 60 Minutes

Answer: (A)

The key idea is timely dissemination of urgent safety information under GMDSS. When you become aware of a distress or hazard at sea, you must release the initial Urgent Marine Information Broadcast promptly—within 15 minutes. This quick broadcast ensures mariners in the affected area receive essential information fast, allowing them to take protective actions without delay.

The initial notice should convey the basics—what happened, where, when, and what mariners should do next—so they can respond even as more details are gathered. After that first message, you can send a Maritime Alert Broadcast to provide updates or changes as the situation evolves. The 15-minute window keeps the warning moving quickly to maximize safety and coordination among responders.