🔍 Key Concepts

• Fire-main system purpose on a vessel (supplying seawater for firefighting) • Environmental exposure on open decks (weather, temperature, sea spray) • Basic safety and operability requirements for firefighting equipment

💭 Think About

• Think about what could prevent the fire-main from working properly when the ship is operating in very cold climates on open decks. • Ask yourself which option directly affects the ability to deliver water through the piping and hydrants when it’s urgently needed. • Consider which choice is a standard safety design requirement versus something related more to convenience or administration (like labeling or security).

✅ Before You Answer

• Which option deals with physical conditions (like temperature) that could stop water from flowing in the pipes? • Which options are not typically mandatory safety requirements found in fire-main regulations (for example, security or numbering)? • Which choice would be most important for ensuring water can actually reach the fire hose on an exposed deck in all normal operating environments?