1. Seawater Is Your Biggest Enemy—Rinse with Fresh Water After Every Trip
For boats operating along the coast over extended periods, seawater is the primary source of corrosion. Although marine-grade aluminum (such as 5083 alloy) used in aluminum landing craft offers excellent corrosion resistance, prolonged salt buildup on the hull’s surface can still erode the oxide layer. The simplest protective measure is to rinse the entire boat with fresh water after every outing, paying special attention to the hull bottom, boarding ramp hinges, and outboard motors. If conditions are limited, rinse the boat with fresh water at least once a week. This procedure is extremely low-cost but can extend the hull’s service life by several years. A customer who has used our 9-meter aluminum landing craft for five years shared his experience: “I spend ten minutes rinsing it every day, and after five years, the hull still looks brand new.” For boats that frequently operate in tidal flat areas, it is recommended to focus on rinsing areas where salt tends to accumulate, such as around the hull welds and the gangway hinges.
2. Sacrificial Anodes Are Not Ornaments—Inspect and Replace Them Regularly
Sacrificial anodes serve as the second line of defense in the corrosion protection system for aluminum landing craft. Zinc or aluminum anodes corrode before the hull does, thereby protecting the hull structure. It is recommended to inspect the anodes for wear every three to six months; when the anodes have worn down to less than 50% of their original volume, they should be replaced promptly. If, during routine inspections, you notice white powder or noticeable pits on the surface of the anodes, this indicates that they are “doing their job.” When replacing anodes, be sure to use products that meet the original manufacturer’s specifications and ensure they make good contact with the hull. Many boat owners neglect this inspection, and by the time pitting appears on the hull, it is already too late. Anodes are inexpensive, but they protect the most valuable structural components of the entire boat.
3. Engine and Fuel System—Regular Maintenance Is Essential
The engine of a landing craft (especially outboard motors) is the most sophisticated component on the entire vessel. It is recommended to change the engine oil and oil filter every 100 hours of operation or every three months; check or replace spark plugs and gear oil every 200 hours. Regarding the fuel system, regularly replacing the fuel filter and cleaning the fuel/water separator can prevent malfunctions caused by fuel contaminants or moisture. For boats that will be out of service for an extended period, it is recommended to fill the fuel tank to capacity and add a fuel stabilizer to prevent fuel degradation. Engine maintenance may seem tedious, but performing it on a regular schedule can effectively mitigate the risk of breaking down at sea. A well-maintained outboard motor can easily exceed 3,000 hours of service life. For commercial operations, one day of engine downtime means one day of lost revenue—this is not an expense that should be skimped on.
4. Electrical System—Waterproofing and Wiring Are Key
The marine environment is humid, and electrical system failures are one of the most common causes of downtime for landing craft. It is recommended to inspect all electrical connections and switches quarterly to ensure there are no signs of looseness, oxidation, or water ingress. All exposed connections should use marine-grade waterproof terminals and be coated with insulating grease. Batteries should be kept clean and dry, with corrosion-inhibiting protectant applied to the terminals. For vessels equipped with electronic navigation equipment, it is recommended to install a voltage stabilizer to protect sensitive equipment. Remember: At sea, a single loose connection can bring an entire voyage to a halt. Experienced boat owners carry a set of spare fuses and wiring tools on board; these small items can prove invaluable in critical moments.
5. Hull and Deck—Repair Minor Damage Promptly
When running aground, the hull is bound to come into contact with sand and gravel. After every voyage, it is recommended to walk around the boat to inspect the hull and sides for scratches, dents, or holes. Although marine-grade aluminum is corrosion-resistant, scratches that penetrate to the bare metal may still lead to pitting corrosion if left exposed to saltwater for extended periods. If you find shallow scratches, you can sand them down and apply aluminum filler to repair them; deeper damage requires professional welding repairs. If the anti-slip grooves on the deck are severely worn, they should be recoated with an anti-slip coating to prevent people from slipping and falling when the deck is wet. By addressing minor repairs promptly, you can avoid the need for major repairs in a dry dock. It is recommended to focus on inspecting the front third of the hull after each beaching operation, as this is the area subject to the most concentrated stress.
6. Seasonal Storage—The Proper Way to Store Your Boat Long-Term
If your landing craft requires seasonal storage (e.g., during winter or the rainy season), proper storage practices can prevent unexpected issues when you set sail the following year. It is recommended to store the hull on land, supported by a boat stand to ensure the hull is not compressed; “winterize” the engine according to the manufacturer’s instructions (including changing the engine oil, adding rust inhibitor, and draining the coolant); disconnect the negative battery terminal and recharge the battery periodically; cover the hull with a waterproof tarp to protect it from direct sunlight and rainwater accumulation. Before setting out the following year, follow the proper procedures to reactivate the engine and electrical systems, and conduct a short test run. The time spent on off-season maintenance will save you repair costs and valuable time when you set out the following year.
