In This Article
- Why prep matters for your insurance
- Step 1: Measure your boat properly
- Step 2: Clear and secure everything on board
- Step 3: Drain fluids and cut the power
- Step 4: Lower anything tall
- Step 5: Check the trailer, not just the boat
- Step 6: Take photos before pickup
- Size limits that trigger permits
- Prep checklist by boat type
- Conclusion
- FAQ
Why Prep Matters for Your Insurance
A boat rarely falls off a trailer because of the truck. It usually happens because a hatch was left open, a battery was still live, or a bimini top caught the wind like a sail.
Interstate transport is harder on a boat than a trip to the ramp. It runs for hours at highway speed, through weather you can’t control, past bridges and weigh stations that don’t care about your schedule.
Most transport companies won’t cover damage caused by poor prep. The time you spend getting your boat ready is often the difference between a smooth delivery and a fight over an insurance claim. Here’s the order to do it in, and why it matters.
Step 1: Measure Your Boat Properly
Do this first. Your numbers decide what permits or extra vehicles the transporter needs to arrange.
Transport height isn’t your boat’s normal height. It’s the trailer deck height plus everything sticking up, antennas included. Measure these four things with the boat in its transport position:
- Length: bow to stern, including anything that sticks out like a bow platform or a tilted-up motor.
- Width: at the widest point, often the hull or a swim platform.
- Height: ground to the highest fixed point. This is usually a hardtop or radar arch, not the hull.
- Weight: the loaded weight, not the dry weight from the spec sheet.
Send these numbers to your transporter before pickup day, since a boat close to a size limit needs lead time for paperwork.
Step 2: Clear and Secure Everything on Board
This is the easiest step to get right and the most common one people skip. Anything loose becomes a hazard at highway speed. Go through the boat in this order:
- Take loose items off the boat. Fenders, life jackets, rods, coolers, and cushions should travel separately if possible. If they must stay, lock them in the cabin, not the deck.
- Tie down gear that’s fixed but still movable. A loose anchor rattling around for hours will scratch the gel coat at best, and tear into fiberglass at worst.
- Check every hatch and door is properly latched, not just closed. Wind and vibration will pop anything that isn’t locked shut.
- Pad any sharp or protruding hardware, like rod holders and cleats, especially if your boat sits near others on the truck.
Step 3: Drain Fluids and Cut the Power
Each fluid on board needs different handling.
Fuel: Run the tank down to about a quarter full. A full tank adds weight and fire risk if a fitting shakes loose. A bone-dry tank can cause condensation problems, so leave a little in.
Water tanks: Drain fresh, grey, and black water tanks completely. Water is heavy, and trapped water can crack pipes if the route hits freezing temperatures. For a closer look at exactly which fluids need draining and which can stay, see our guide on what fluid to drain before transporting a boat interstate.
Battery: Disconnect the terminals. Flicking the isolator switch off isn’t enough; a loose connection can still spark.
Bilge pump: Leave this running with the float switch active if the boat sits outside overnight. Rainwater with a dead bilge pump is worse than the small extra power draw.
Step 4: Lower Anything Tall
This step gets skipped most often because it takes tools and time.
Antennas: Lower or remove them. The single most forgotten item, and the cheapest to fix.
Bimini tops and canvas: Lower and tie down, or remove for longer trips. Left up, they won’t survive highway wind.
Masts on sailboats: These almost always need to come down. This is a job for someone with experience, not a first attempt on pickup morning.
Radar arches and outriggers: Fold down if hinged. If fixed in place, they count in your Step 1 height measurement and might be what pushes you over the size limit.
Step 5: Check the Trailer, Not Just the Boat
If you’re supplying your own trailer, its condition matters as much as the boat’s.
Check tyre pressure and tread on every tyre, including the spare. Test all lights and brake lights, since a dead brake light can get the whole load pulled over. Check the wheel bearings for play or noise, and confirm the coupling and safety chains are rated for the full loaded weight.
A trailer problem mid-route doesn’t just cause a delay. It can leave your boat stranded on the highway shoulder for hours.
If you’d rather not deal with your own trailer at all, it’s worth reading owner-operator vs broker for boat transport before you book, since it affects who’s actually responsible for the equipment on the day.
Step 6: Take Photos Before Pickup
Photograph your boat from every angle before the transporter arrives, including close-ups of any existing scratches or gel coat damage.
This isn’t about distrust. It gives you a clear record if there’s ever a dispute about the condition on arrival, and a good transporter will want this record just as much as you do.
Size Limits That Trigger Permits
Once a boat and trailer combination passes certain size limits, it stops being a standard load. It needs a permit, and sometimes a pilot vehicle. These limits vary a little between states, but the general pattern across Australia looks like this:
| Dimension | Standard limit (general guide) | What happens above it |
| Width | Around 2.5 metres | Becomes an oversize load, may need a permit |
| Height | Around 4.3 metres | Becomes an oversize load, the route must avoid low bridges |
| Length | Around 25 to 26 metres | May require a pilot vehicle |
| Width (pilot trigger) | Around 3.5 metres in most states | Usually needs one pilot vehicle |
These are general guides, not fixed law. The exact limit depends on the state, the road, and current transport rules, so it always needs checking against your specific route. A boat at 2.6 metres wide is a different booking from one at 2.4 metres, because the wider one needs paperwork lodged in advance.
This is why sending your transporter real measurements early matters more than almost anything else here. A permit or pilot vehicle can take days to arrange, and finding out you need one on pickup morning means a delay, not a quick fix.
Prep Checklist by Boat Type
- Tinnies and runabouts: Mostly Steps 2 and 3. Little to lower, but don’t skip securing loose gear.
- Ski and wake boats: Same as above, plus fold the tower down if it’s a folding design.
- Cruisers: All six steps apply, with a cabin full of gear and a hardtop that affects height.
- Sailboats: Step 4 is the hard part because of the mast. Give yourself extra time.
- Yachts: Every step, at a bigger scale, and most likely to hit the size limits above.
Conclusion
Getting a boat ready for interstate transport comes down to six things, done in order: measure it properly, clear and secure everything on board, drain fluids and cut the power, lower anything tall, check the trailer, and photograph the boat before pickup.
How long that takes depends on the boat. A tinny might take half an hour. A sailboat with a mast to lower, or a yacht close to the size limits, can take most of a day. There’s no single number that fits every boat, so don’t trust a guide that gives you one.
What stays the same is the order and the reason behind it. Measurements come first because they decide what permits need arranging, and that takes lead time. Securing and draining come next because they cause most in-transit damage. Photos come last because they protect you no matter what happens on the road.
Follow that order, give your transporter real numbers early, and the rest of the process runs the way it’s meant to.
If you’re ready to book, get in touch for a quote, or visit our interstate boat transport services page to see everything we offer.
