Fuel and Weather Decision at a Remote Ramp
You launch at a remote ramp on a large lake at 0800 with a 4.8 m aluminium boat and a 60 hp four-stroke outboard. The forecast is for 10–15 knot winds rising to 20–25 knots by early afternoon, with a chance of thunderstorms after 1500. Your plan is to run 18 km up the lake to a fishing spot and return. The tank holds 60 L; the engine uses roughly 1 L per 3 km at your normal cruising speed. You have a phone with patchy signal, a hand-held VHF, and no EPIRB. Your companion has never driven a boat. By 1300 you are at the spot with about 35 L remaining and the wind is already gusting to 20 knots with whitecaps building.
1. Using the fuel figures, what is your realistic fuel margin for the return trip, and what does that tell you about when to leave?
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The run out was 18 km, so the return is also 18 km. At 1 L per 3 km, the return needs about 6 L at cruise. But that is the calm-water figure: into a 20–25 knot headwind and chop, plan on 20–40% more, so call it 8–9 L. With 35 L remaining you have a large nominal margin, but the real constraint is time and weather, not fuel. The bigger risk is the trip taking much longer in rough water and the afternoon storms arriving while you are exposed. The fuel maths says you can physically get back; the weather trend says leave now rather than wait for the storm window to close. A prudent decision is to depart immediately, at reduced speed, and not push further up the lake.
2. What is the main risk of taking the inexperienced companion as a driver on the return leg, and how would you manage it?
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The main risk is that an inexperienced driver cannot read the sea state, hold a steady heading in a following or beam sea, or react to a developing situation while you are distracted. Handing over mid-trip in building wind and chop is poor risk management. A better approach: you drive the rough section yourself, brief the companion on the basics (kill switch, throttle, keeping a lookout, what to do if you go overboard), and only let them take the helm in calmer water with you supervising closely. Confirm they know how to stop the engine and use the radio before you hand over.
3. You have no EPIRB and patchy phone signal. What does that mean for your trip planning and what should you do before departing the fishing spot?
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With no EPIRB and unreliable phone coverage, your ability to call for help in an emergency is limited, so prevention matters more. Before leaving the spot: check the VHF works and know which channel the local marine rescue monitors; tell someone ashore your route and expected arrival time (a float plan); confirm lifejackets are worn, especially in the worsening conditions; check the weather again if signal allows; and secure gear so a capsize or swamping does not scatter it. If conditions deteriorate beyond your comfort, the fallback is to shelter and wait rather than press on. The absence of an EPIRB is a reason to be more conservative, not less.