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How to sink a 6m cat quickly

Printed From: The Fishing Website
Category: Saltwater Fishing
Forum Name: The Briny Bar
Forum Description: The place for general chat on saltwater fishing!
URL: https://www.fishing.net.nz/forum/forum_posts.asp?TID=60771
Printed Date: 07 Jun 2026 at 4:50pm


Topic: How to sink a 6m cat quickly
Posted By: Keith C
Subject: How to sink a 6m cat quickly
Date Posted: 20 Dec 2010 at 12:38am
6m of glassfibre cat with 3 guys of 100 kg or thereabouts on board and fishing in torrential rain. 400 litres of fuel in under-floor tanks. Self-draining deck with duckbill scuppers. Bilge pump in each hull with about 3/4 inch pipe on each.
We had been fishing for about 3, maybe 4 hours in the pouring rain and the water around my feet in the port transom was nothing unusual as it usually washes around there. Being a self-draining deck and continual rain, there was no need to worry. Tui. However, my tackle bag, at least 1m forward was now starting to float (with three trays of jigs and jigheads plus the rest). Anyway, time to move anyway. Skipper says port bilge pump not working properly so will I skip the boat to the next spot while he opens the hatch in the motor well to see if he can get it working.
Unfortunately as he moves his frame of 20kg more than mine to the stern and I move to the wheel, the list to port becomes significant. I realise something is amiss and try and get the boat on the plane. No such luck! I have the motors at almost full revs which means the skipper at the stern cannot hear me shouting at him to move forward. I ask other fisho on port to move to starboard. He doesn't hear me and after me shouting accompanied with a not so gentle tap on his shoulder, he moves to starboard very pissed off with me because the bilge pump is now working. (He was totally oblivious of the danger of the  situation at the time.) We slowly come out of the hole and up onto the plane as the skipper now finished in the motor well moves forward. The scuppers can now at least drain the half-flooded deck. The skipper related later that he realised we were in the **** when he looked forward after getting the bilge working and seeing the steep deck angle between the port stern and the rest of the boat.
 
While we were at rest, there was no visible problem but the shift in weight distribution caused all the water in the port hull to run to the stern. Who knows how much water but we drove around for 20 minutes pumping water like a fountain at full bore from that 3/4 in. pipe. 400 litres of fuel on board certainly would not have helped.
 
Lessons learned:
 
Find and fix that bloody leak!!!
Check hulls regularly for water while at sea.
Keep cellphone or comms mechanism at hand or in your pocket. (All comms device were in the cabin out of the rain and VHF is fixed.) We would have been in the water without any comms in very poor visibility despite not being far from land (between Matiatia & Motuihe channel).
 
You hear of boats sinking very quickly without any opportunity to radio and you wonder how. I know how.



Replies:
Posted By: Wee Tin
Date Posted: 20 Dec 2010 at 2:44am
Wow Keith it can hit the fan real quick and you can't walk home either out there.  I know how safety conscious you are as well and relieved that the end result of this story was not a sinking.  Thank you for sharing.


Posted By: kaveman
Date Posted: 20 Dec 2010 at 6:13am
Sh##T, glad you managed to get things sorted quickly Keith. Like the water on the "outside" of my boatTongue

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www.kavemantackle.co.nz


Posted By: skidoggg
Date Posted: 20 Dec 2010 at 6:52am
400kg of fuel 300 kg of people whatabout the beer and fish and ice and bait ?
glad you guys are ok , good to hear someones not scared of a bit of rain ,dunno about a boat that always has water washin around your feet tho ,time to trade it in on a pontoon !


Posted By: Espresso
Date Posted: 20 Dec 2010 at 7:30am
cheers for the info. always good to learn more from real situations, glad it worked out, good work.


Posted By: Cbro
Date Posted: 20 Dec 2010 at 7:46am
Lucky bro...glad this didnt end in a very sad way.
Has the boat got an in-board?

Had a similar experience in a 5m alloy, jigging away then realizing my feet were in water, bilge failed and my mate only just got the boat up an going. had to pull into an island's very rocky bay an fix the bilge. was a pretty scary trip home knowing there was a leak.


Posted By: Damo
Date Posted: 20 Dec 2010 at 7:57am
"20 minutes pumping water like a fountain at full bore from that 3/4 in. pipe"Shocked

Sounds like a leaky old hunk of crap. Lucky you werent a statistic and the country had to waste more resources looking for 3 idiots in unseaworthy boat

GYST




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Posted By: scottej
Date Posted: 20 Dec 2010 at 8:01am
Harsh Damo but maybe true. A stink way to learn!!


Posted By: Keith C
Date Posted: 20 Dec 2010 at 8:19am
Damo, comment taken but it seems the leak is from the deck and not the hull.
 
And I wouldn't think that grit jamming the bilge pump makes a boat unseaworthy.


Posted By: Capt Asparagus
Date Posted: 20 Dec 2010 at 8:42am
It's a worry ain't it. The one that stands out to me is having to tell someone to shift themselves to even out the boat. That is something that always burns my buns, you are belting along just sweet, then someone feels they really have to move the whole metre and a half or so to stand on the otehr side of the boat.... for no readily apparent reason, making the whole boat heel sharply..not nice when you are running with a large swell at the time too. And they always look so offended when you tell them to get the eff back!


Posted By: Sufishent
Date Posted: 20 Dec 2010 at 8:54am
Agree it's a terrifying experience. I was up north (Whatuwhiwhi) earlier this year and forgot to put the bung back in after the morning session. Beach launched and the two of us headed off to the middle of the bay for an sb fish. We drifted and repositioned fairly frequently but I did notice the boat was struggling to get onto the plane as we repositioned for a drift over the same spot  (boats a 15' Marco with 40 Yammie so getting out of the hole not usually an issue).  Decided we'd had enough and started to head back in - mate was at the back after pulling in the drogue and I pushed the throttle forward and mate said - "what's all this water in the boat". Didn't take a rocket scientist (I'm not one) to figure out the bung had been left out. Fortunately I'd read somewhere that a reasonable idle is best for removing water and do not use full throttle as this chucks all the water to the back of the boat and weighs the boat down even more  - which is what happened to us and sounds like what nearly happened to you. Like you, on with bilge pump and cruise around for 5 minutes so water can drain out.

I always prep the boat at home before I leave and launch the same way but because we were away from home the normal routine got thrown out of the window.  Lesson learnt.


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You can never have enough fishing tackle


Posted By: Catchit
Date Posted: 20 Dec 2010 at 9:00am
yea, I think most of us have done the bung thing (ok, except Damo, who is perfect) . Pretty scary but lessons usually learnt.
 
Glad it turned out ok Keith..


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Posted By: nodamboat
Date Posted: 20 Dec 2010 at 9:08am
Yup also done the bung thing,
I didn't realise the boat was filling up at all, it was only when I saw the water in the bilge that I realised. (Just thought to myself to check an oil resourvour I just replaced - otherwise wouldn't of noticed until much later)
I wouldn't be harsh on anyone wether it was a leak or a bung. Like everyone has said, you don't realise until it's like "holy crapola .... lets get this sorted"
 
Thanks for the tip regarding a fast idle to drain a boat  sufishent- hopefully won't have to use it.


Posted By: Damo
Date Posted: 20 Dec 2010 at 9:35am
Originally posted by Haku-2 Haku-2 wrote:

yea, I think most of us have done the bung thing (ok, except Damo, who is perfect) . Pretty scary but lessons usually learnt.
 
Glad it turned out ok Keith..


far from it you git.

PM your issue Haku so we dont hijack the thread with your petty shyte...you make it clear you have a negative attitude towards me


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Posted By: Keith C
Date Posted: 20 Dec 2010 at 9:56am
With a situation where you forget to insert the bung, you have the advantage that the hull will drain through the open bung hole. In our situation, I cannot think of another way to drain the hull besides beaching (if the bilge pump didn't start).


Posted By: livebait
Date Posted: 20 Dec 2010 at 10:21am
Okahu ramp last  month, 2 boats on either siade of the ramp launched with no bungs..


Posted By: JB
Date Posted: 20 Dec 2010 at 10:51am
Keith, are they thinking of replacing the scupper system to address the issue of water build up. Also may be if they want wiring in a bilge alarm also might highlight any build up of water in the bilge before its too late? I'm sure that you cna get them relatively cheap. Should be just a flaot switch onto an alarm type system or maybe a horn?
Glade it worked out for you.

regards JB


Posted By: Capt Asparagus
Date Posted: 20 Dec 2010 at 11:25am
Always been kinda wary of duckbills for cockpit drainage, coz once they go under, well.... they are not exactly watertight are they, so nothing to really stop a bad situation becoming worse...
Anotehr thing I have found the hard way is that bige pumps do not like lengths of braid in them. They seem to stop working for some reason..... ;-)


Posted By: JW
Date Posted: 20 Dec 2010 at 11:58am
Glad you got out of that one OK. I was further north fishing in the lee of it. They wound back the forecast late Saturday but should have left the wind where it was as it felt more like 25-30 at times. Got a bit damp (would have been drier if I'd gone for a swim).


Posted By: Big -Dave
Date Posted: 20 Dec 2010 at 12:32pm
I have my bilge pump on a float switch, if it starts at any time I go looking as to why.
Where I camp, the bung never gets taken out, when I get to the beach it gets put in and there it stays for the duration.
One day one of the kids thought they would be helpful, and pulled it out.....they learned to NEVER DO THAT AGAIN!.
When washing the boat i leave the bung in and let the bilge pump clear the deck water, then I know it still works...


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you can't fix an idiot with duct tape, but it does muffle them for a while...


Posted By: Blue Asparagus
Date Posted: 20 Dec 2010 at 1:00pm
bllody hell mate, i know from experience how you feel, glad your ok, get that deck crack sorted mate and if you need a boat bulder to do it let us know, may even get it sorted prior to xmas if ya move on it.

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Ultimate GAME Fishing Adventures. Northland



Posted By: Blue Asparagus
Date Posted: 20 Dec 2010 at 1:03pm
Originally posted by Damo Damo wrote:

Originally posted by Haku-2 Haku-2 wrote:

yea, I think most of us have done the bung thing (ok, except Damo, who is perfect) . Pretty scary but lessons usually learnt.
 
Glad it turned out ok Keith..


far from it you git.

PM your issue Haku so we dont hijack the thread with your petty shyte...you make it clear you have a negative attitude towards me


water off a ducks back mate, water off a ducks back


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Ultimate GAME Fishing Adventures. Northland



Posted By: Keith C
Date Posted: 20 Dec 2010 at 1:15pm
Originally posted by (erebro (erebro wrote:


Has the boat got an in-board?
 
2 X two-year old 115HP pushing an excellent sea-going Australian hull. When the motor don't get you out of the hole, you know there is a problem.
 
As pointed out earlier, the water came from above and not below the waterline. The leak is obviously somewhere on deck.
 
When the boat was acquired, instead of the duckbills, it had flaps over holes about 2 X 2 inch for draining the wet deck. There was then more water continually sloshing about on deck. I grew up fishing only on wet deck/self-draining deck so water at your feet is nothing unusual for me. A self-draining deck was regulatory to get a sea-worthiness certificate.  Built in flotation was also mandatory.
 
The thought of taking a green one over the top onto a NZ boat with bilge pumps instills more fear than the water on top that can run off a self-draining deck. Many boats back in RSA also had low transoms in order to allow water to run off and cabins had to have a sill to preferably tall enough to stop water flowing into the cabin and causing the boat to sink bow down.


Posted By: CapnHook
Date Posted: 20 Dec 2010 at 2:28pm
 
 
Sorry to hear of your misfortune Keith - perhaps a lesson learn't eh ?
Most of us wouldn't have the intestional fortitude to post an embarrasing
incident such as yours
 
 
 
I also feel sorry for this bloke . . .
 
Originally posted by Damo Damo wrote:

"20 minutes pumping water like a fountain at full bore from that
3/4 in. pipe" Sounds like a leaky old hunk of crap. Lucky you werent a statistic and the
country had to waste more resources looking for 3 idiots in unseaworthy boat GYST
 
 
He would do well to read your signature;

The use of your brain is not known to deplete it. Try it!

 


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If you're not on the edge you're taking up too much room.




Posted By: Damo
Date Posted: 20 Dec 2010 at 3:21pm
sympathy accepted Hook you old fuctard - thanks

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Posted By: MJ
Date Posted: 20 Dec 2010 at 5:53pm
Scary stuff. Glad to hear you and the crew escaped safely Keith. Did you have the inflatable lifejacket on?
 
Have to say Damo its a bit harsh calling Keith an idiot. He's a well respected member of the forum, and one of the most safety-conscious guys I know on the sea.


Posted By: Keith C
Date Posted: 20 Dec 2010 at 6:05pm
Yes, Paul, as always I had my lifejacket on.
 
CapnHook , my only hope with the post is that we can all take lessons from it. Especially significant for me was that the water seems to have come in from the deck at a yet to be determined location. Deck inspection hatch not tightened, crack, who knows? Also the speed with which the list happened. The fact that the conditions were benign and the craft would be considered seaworthy with all the necessary safety equipment made no difference.


Posted By: Catchit
Date Posted: 20 Dec 2010 at 7:40pm
Originally posted by Damo Damo wrote:

Originally posted by Haku-2 Haku-2 wrote:

yea, I think most of us have done the bung thing (ok, except Damo, who is perfect) . Pretty scary but lessons usually learnt.
 
Glad it turned out ok Keith..


far from it you git.

PM your issue Haku so we dont hijack the thread with your petty shyte...you make it clear you have a negative attitude towards me
 
lol
 
Merry Xmas Damo Hug


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"We gave Sir Peter a knighthood," Mr Key said, "And if we could give him a second one, we would."



Posted By: tobez
Date Posted: 21 Dec 2010 at 7:11am
bugger mate - alls well that ends well aye mate...bet u wish u had fugly there for a while



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