Whether you've been using a roof-topper for years, or about to buy one and start exploring, this page is focused on the common roof-topper questions related to the Kapten Boat Collars.
We understand you're limited to what size boat you can have due to the weight restrictions of your vehicle's capacity, car's width, &/or loader's restrictions.
Most car-toppers are a maximum of 3.8m long, but the majority are around 3.2m - 3.5m, which often means the boat is unstable & prone to capsize.
When you've got a tippy boat, the crew are frequently wary, concerned with their position & movement in the boat, which doesn't make for pleasant trips on the water.
But with a truly stable, and unsinkable boat, where you're free to move & stand, you can fully relax and enjoy your adventures, making every trip fun, safe and rewarding for everyone.
SIDE LOADER - winched v's muscles
When the boat rolls on the Collar, this doesn't hurt the Collar, but it will get scratched if rolled on gravel or rough bitumen.
The 3.8m Bluefin Varmint (on left), was fitted with a pair of 1.2m long BC Shields, which not only protect most of the side when rolled on, but also protects it when hauling up crab pots etc. (More info on the BC Shields coming)
QUESTION 4 - How can I hold it down without damaging my Collar?
Ratchet straps with Straps Protectors.
The most common practice of tying car-toppers down, is to use a couple of ratchet straps. This will place pressure on the Collars, due to the reverse chine shape now added to the boat (see above profile photo).
To prevent undue stress on the Collar, you can purchase Strap Protectors (or make your own) - which will spread the load across a larger area - or chose a different tie-down method for your boat.
Our Strap Protectors are pressed from 3mm alloy, hole punctured to allow even large straps & buckles to pass through, and cupped each end to secure it onto the Collar. They're $79 a pair incl GST.
If you like to really crank your boat down super tight, this system may not be the best for your Collar, so we suggest you consider the below/next option - Bruce's bolt method.
Bruce's bolt-down method = no straps needed.
Bruce came up with this method for his 3.8m Bluefin Varmint, and we think it's very clever & simple way of really securing your tinnie without the need for super tight straps over the top.
Drastically reduce the risk of breaking a window or denting your car from throwing heavy ratchet straps blindly over the top of the boat - this method requires a thick pad of aluminium to be welded to 4 exact spots on the gunwale of the boat, so that they line up perfectly with your roof-racks.
Once on the rack, a long bolt is passed through the pad and the roof rack (which needs to be drilled through), and a washer and nut holds the bolt firmly in place. No room for the boat to move, and if one bolt did come loose, you've got 3 more holding it down.
Bruce's method was shared & discussed on our Facebook Group page, 'Kapten Boat Collar Club', and a fellow customer suggested a longer bolt be used so a pin could be placed at the end for added security. Always better to be safer than sorry.
Other great ideas customers have had:
- attached hooped stainless eye-bolts (not sure if welded in), at 4 points on the gunwale as well as the outermost part of the racks and cranked the boat down tight using stainless steel hooked turnbuckles.
- strapped boat down by the inside seat, instead of over the top, and then tied bow to bullbar, and transom handles to the rear bumper (a lot of straps are needed).
QUESTION 5 - How much extra weight will the Collars add?
A common and very important question, is how much weight will the Collars add.
This will depend on the style and size of your Boat Collar, but as the Collars are made from closed-cell polyethylene foam, they're very light and not much weight in them at all.
Weights are approximate only:
(100mm W x 160mm H)
2.5m boat = 4-5kgs
3m boat = 6-7 kgs
3.5m boat = 8-9kgs
Slim Collar (new)
(100mm W x 240mm H)
2.5m boat = 5-6 kgs
3m boat = 7-8 kgs
3.5m boat = 9-10 kgs
(140mm W x 240mm H)
2.5m boat = 6-7 kgs
3m boat = 8-9 kgs
3.5m boat = 10-11 kgs
3.8m boat = 12-13 kgs
Office: (07) 5441 3636
Mobile: 0423 499 047
58 Arundell Ave Nambour, QLD, Australia 4560.
Australian Patent # 2010201449. American Patent Application # 13/083,588 - Watercraft Accessory.
Marine Safety Innovations Pty Ltd.
ABN # 53 141 908 385
Australian owned & operated since 2010