scuppers on a riptide - are they too low ?

[saurian]

Thanks Bean , Havn't owned one as poorly designed as that.
My cabin is scuppered in present boat . So stepped down deck at front is
problem.
Ta.

[Dr DRIFT]

On my signature 575F thier are 2 scuppers out the back, but if the water did go foward into the cabin, there is also a drainage hole upfront, that will bring the water back down to the back and out....

[Matt_F]

Hi All,

My understandig of self draining decks with scuppers, or freeing ports (technically a scupper is different to a freeing port, but that is for another day) is to drain water from the deck either at anchor or under way. So in smaller boats the problem of scuppers and hence deck height being too low is relative to the water line, the amount of water displaced by the hull and it's load. Hence smaller boats will displace less water lowering the water line under load and take water in through the scuppers. So scuppers in smaller boats should only work to a point unless you have the vinyl tubes like gelsec and keep them up when the boat is under load. Water continually sloshing around on the deck is extreemly frustrating and and if you are from FNQ where we fish with handlines, it will tangle your line while it sits on the deck all day long. With all that said I think self draining decks and scuppers are great as long as the architect gets all the figures right.

Matt.

[davo]

Mate my little 4.8M Fisher has scuppers and I never get a wet deck and I've had water in it and it just drains. Another Fisher owner I know has had a wave over the front and still no dramas.

[Matt_F]

Davo,

If you put enough camping gear, fuel, water, people etc. in a Fisher then it will eventually raise the water line to the scupper. But the Fishers are a well designed hull and this will probably never be a problem because the amount of weight required to do this is more than you would ever put in the boat.

By the way I accidently didn't read all the pages in the thread so after reading the other pages it would appear I just repeated the above logic.

[seatime]

If you want to know where not to put scuppers, read the incident report into the loss of a commonwealth immigration dept 6m plate boat in the Torres Strait in 2005. The scuppers on that boat where 2-3" below the waterline before anyone loaded it.
It was purpose built by Subsea in Cairns for IMMIA, 5 people lost their lives when it sank. It was supposed to be in survey. 6 boats were built, and all had serious defects.
It pays to stick with reputable, proven brands and hull designs.