Regular maintenance for a fire extinguisher has two parts: a quick monthly visual check and periodic professional servicing guided by the manufacturer. The monthly check is simple but essential: ensure the unit is accessible, the tamper seal is intact, the pressure gauge is in the green (properly charged), there’s no corrosion or leakage, and the nozzle and hose are clear. These quick checks catch issues early so the extinguisher will work when you need it. The professional servicing, scheduled according to the manufacturer’s instructions, goes beyond appearance: it includes proper recharge after use, internal inspections if required for the type of extinguisher, and any hydrostatic or other tests at the recommended intervals. This combination—monthly checks plus manufacturer-guided service—is what keeps the extinguisher reliable and compliant. The other options aren’t accurate: you still inspect even if it hasn’t been used, you don’t replace it after a fixed year, and you don’t test by throwing it in water, which could cause damage and is unsafe.

Using markers or radar in a Man Overboard search gives the team a shared reference frame and keeps everyone aligned on where to search and how to move next. Dropped markers or floating buoys mark the last known position or the edges of the search area, so crew members can see at a glance which sectors have been covered and what area remains to be scanned. This visual reference prevents gaps or overlap and helps coordinate movements, timing, and shifts of responsibility. Radar adds an electronic lookout, especially in low visibility, by showing objects on the water and tracking drift patterns. It helps you confirm the MOB’s location or the general area to search, monitor progress, and communicate a consistent picture to the whole crew. Together, markers and radar support deliberate, organized search patterns and clear teamwork. The other options don’t fit the situation: hull speed isn’t about locating a person in the water, radar isn’t something to turn off during a MOB search, and markers don’t replace vocal or radio calls—you still need to communicate clearly while using markers or radar to maintain the shared reference.

Damage to major blood vessels can be life-threatening because they control the flow of blood to and from the heart. Arteries carry blood under high pressure away from the heart, so when one is damaged the bleeding is fast and can rapidly lead to shock from drastic blood loss. Veins, while at lower pressure, can still unleash a large volume of blood if a major vein is torn, also risking severe blood loss and shock. Capillaries are very small, and while bleeding from them can occur, it’s typically slower and less immediately life-threatening than arterial or major venous bleeding. So both veins and arteries can cause death if damaged, making those vessels the critical concern in severe injuries.

Preventing fuel spills on deck comes down to a complete fueling procedure that controls flow, reduces ignition risk, and keeps the deck protected and clean. Following a proper fueling process means coordinating steps like grounding or bonding to prevent static sparks, monitoring the fuel level to avoid overfill, and shutting off the flow at the right moment. Keeping away from open flames is essential because fuel vapors can ignite. Using a spill mat provides immediate containment under the fueling point, catching drips and preventing them from spreading. Having absorbent pads ready ensures any small spill can be quickly absorbed and cleaned up, reducing slip hazards. Avoiding overfilling is crucial because even a brief overfill can lead to spills onto the deck or into bilge areas. Together, these practices minimize the chance of a spill and make cleanup straightforward if a small amount occurs. The other options fall short because they skip or undermine one or more of these protective measures. Doing nothing openly invites spills and fires. Filling to the maximum and mop-later invites overflow and increases cleanup difficulty. Staying away from flames but ignoring spill mats leaves you vulnerable to drips and spreading spills, defeating the containment step.

Detecting a person overboard relies on noticing a missing person on deck along with water-related signs, and responding immediately. If someone disappears from the deck and you notice a splash or wake in the water, you know someone has entered the water and you must start immediate man overboard procedures. That combination of a missing person and a water sign signals a real emergency and prompts rapid action to locate and recover the person. The other options don’t indicate someone has fallen overboard: a calm sea and clear sky don’t show any incident; a sudden engine noise could be unrelated; a wine bottle rolling isn’t linked to an SAMPLEoverboard event.