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Old 04-04-2011, 16:46   #16
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Re: Tank Sizes

MAny cats that are geared towards charter business have larger tanks. A 40 ft cat would typically have 600 liter water, 40-50 liters holding tanks for each head and 250-300 liters of fuel.
With the increased used of water makers, I see that in newer models, water tanks are going down by size.

Also, as Paul said, where and how you are going to use yr boat, how many you will be on board when cruising can change the picture drastically. Therefore a configuragion that works for me, might not for you..

Cheers

Yeloya
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Old 10-04-2011, 23:42   #17
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Re: Tank Sizes

Our Lagoon 380 has, and it is new.
2 x 300 Liter Water
2 x 130 Liter fuel
2 x 90 Liter Holding
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Old 12-04-2011, 11:57   #18
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Re: Tank Sizes

If you NEVER want to go to the pumpout, then replace your head (at least 1 of them) with a composting toilet.
Lots of info here: Composting Toilets
We were very close to doing it but when we talked to the guy at Nature's Head he didn't recommended it for a family of 4 and liveaboards, but it's perfect for 2.
At a thousand a poop for one, we just couldn't buy 2.
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Old 12-04-2011, 12:32   #19
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Re: Tank Sizes

My boat has the following:
110 Gallon Diesel
120 Gallon fresh water
60 gallon holding

I have a 6.7 gallon per hour water maker.
The amount of diesel is perfectly adequate for about 150 engine hours. I get 6 knots on one engine so I have a range of about 900 nautical miles of motoring. I have fresh water flush heads so I use way more fresh water than I need to. If you have saltwater flush heads your water use should be way below mine. My 120 gallons last about 5 days with 4 people on board with reasonable conservation efforts. The holding tank lasts 4 to 5 days with 4 people.
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Old 12-04-2011, 13:17   #20
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Re: Tank Sizes

Quote:
Originally Posted by crewofnoka View Post
If you NEVER want to go to the pumpout, then replace your head (at least 1 of them) with a composting toilet.
Lots of info here: Composting Toilets
We were very close to doing it but when we talked to the guy at Nature's Head he didn't recommended it for a family of 4 and liveaboards, but it's perfect for 2.
At a thousand a poop for one, we just couldn't buy 2.

Woops- THAT was a mistake - I meant at $1000 a POP for one composting head......
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Old 15-04-2011, 19:25   #21
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Re: Tank Sizes

If you read crusing cat blogs cruising the wide spaces of the Pacific many are carrying extra jerry cans of fuel and beholden to chasing fuel.

Many of the ex charter boats and production cats have inadequate fuel for long distance crusing and would best prepared by installing addittional fuel tankage.

Perhaps OK in Carrabiean but not the Pacific.
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Old 16-04-2011, 16:29   #22
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Re: Tank Sizes

Welcome to CF!

Our boat, a St Francis 44:

Fuel: 2 X 53 gallons (each engine burns .67 gph @ 2800 rpm; this equates to around 6.5 knots on 1 engine, assuming reasonably flat water and little wind, so theoretical range under power is about 1000 nm's, running 1 engine) We always carry 2 - 6 gallon emergency jerry cans, though.

Water: 2 X 50 gallon tanks (with Spectra 16 gph watermaker); with 2 on board and running "normal" daily use, that lasts us about 5 days without trying to conserve. Of course, with a watermaker, one just becomes less conservative -- we really don't worry about it. We know that if we had to, we could get by on considerably less, but that would mean fewer showers. We both like to go to bed clean, though.

Holding tanks: 2 X 45 gallon tanks; with just us two on board, we tend to just use one toilet and the 45 gallon tank is good for about a week. If we had to do so, we could switch to the other toilet and go for 2 weeks, but we've never had to do it.

There's no doubt in mind that if you're in no discharge waters, the small size of many holding tanks is a limiting factor. If you can choose, don't skimp on the holding tank!

ID
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