Uneven fouling - any ideas?

[SteveA]

Recently I went to the boat to scrub off any weed and found that although there were long strands of green weed (6"+) merrily growing right down the starbd side but, apart from about 4' to the bow, the port side was completely clean.

The boat (36') is on a tidal swinging mooring.

Has anyone any idea why this happens?

 

[oldsaltoz]

G’day Steve,
Does your boat actually swing on it’s mooring or stay in one direction moat of the time, if the latter is the case the amount of light or sunshine will cause dramatic differences in growth rates; the other cause may be not enough stirring prior to and during the application of the anti-foul
Ok I have said my 2 bob’s worth, I hope this helps.

Avagoodweekend Old Salt Oz……

 

[ccscott49]

Oldsltz, has hit on the right idea, it happens to boats on pontoons all the time.

 

[SteveA]

It is a swinging mooring i.e. the boat is pointing into the tide which runs about North - South or South /North depending if it's coming in or out! - and it only touches bottom on the bug springs.

Colin you know where it is - the mooring is straight out from the Ship Inn at Piel Island.

This fouling on one side isn't unique to my boat - talking to others locally they have found the same thing.

 

[ccscott49]

Yes! Of course what a pillock! I think its still the same thing, with one side being exposed to the sun for a longer period, Especially as they lie n/s and a little bit at the bow gets more fouling aswell, it's the way the boats are lying. I'm sure of it.

 

[tcm]

Re: Uneven fouling - 15 possible reasons....

well then, watson, the reasons for there being more waterline growth on one side rather than other other must be because of one or more of the following reasons:

1) to do with sunlight or lack of it - provided this matches the tidal swings, or mostly matches the tidal swings

2) to do with fish preferrng to graze on one side of the boat or the other

3) the stinky water outlet on you boat being on one side or t'other.

4) You had a dinghy tied to one side, shielding it from the sunlight.

5) An opportunistic rafting boat hooked up to you for several weeks whilst you were away.

6) You went cross channel one one tack, and the sunlight dried out and killed the nascent growth on one side. On the return trip you came back at night and it rained, so the growth on that other side was not similarly affected.

7) Just as the growth was beginning you went out and moored alongside whereupon a dog peed on the hull and destroyed the nascent growth on just one side.

8) a hideous, localized and unreported chemical leak swept down the river at high speed, only touching your boat on one side

9) The boat next door has used some amazingly nasty chemicals to clean his boat, which inhibited the growth in the same way as the undiluted dog piss.

10) You went catstrocpically aground one day, aren't telling us about it, and the slamming and grinding in fould chemical-riden mud and sand as the tide went out has removed the growth on that side.

11) someone miscreant has borrowed your boat and done (10) above without your knowledge.

12) A school of rough-skinned pan-scrubber-backed whale sharks has shot upriver in such numbers as to squeeze along the sides of the boats on their way up and down, on the same tide.

13) A single rough-skinned large fish has attempted to have sex with you boat, and was possibly successful seeing as how he's cleaned half the boat.

14) The boat next door is a corn-circler. Whislt boating the same prankish cunning has led him to clean your waterline on just one side, simply to enjoy your befuddled wonderings.

15) You are the lucky victim of the local idiot boat cleaning wallah, who regularly starts cleaning the wrong boat. He starts at the bows on one side and only realises his mistake upon reaching the stern where the name is displayed more clearly.

 

[ccscott49]

Re: Uneven fouling - 15 possible reasons....

His mooring is close to Sellafield and other such wonderful places, thats why he doesn't need a radar reflector, it glows in the dark, there's fish around there mutated enough to eat the boat, never mind the fouling!! /forums/images/icons/smile.gif


<P ID="edit"><FONT SIZE=-1>Edited by ccscott49 on 06/09/2002 16:28 (server time).</FONT></P>

 

[SteveA]

Re: Uneven fouling - 15 possible reasons....

I think you've got it - it's the Ninjy Mutant sex mad glow in the dark dogfish; very common around here!

 

[AndrewB]

Nice one, tcm, LMAO (nm)

nm

 

[Cornishman]

Re: Uneven antifouling? nm

*

 

[longjohnsilver]

Confession!

I am the said boat cleaning idiot, often choose a boat for the hell of it and clean just one side and then sit back and watch the scratching of heads and puzzled expressions.

Great sport!

 

[DanTribe]

Do you leave the helm lashed to give the boat a shear? In which case one side will always be presenting to the tide and t'other side will have less flow. Very boring explanation compared to the others, sorry.
Dan

 

[SteveA]

Dan,

The most likely reason - I do lash the wheel which probalbly gives the boat a slight shear to Port! - I guess I'll have to give up on the Ninjy Mutant Dogfish theory- many thanks.