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Post Options Post Options   Likes (0) Likes(0)   Quote mattyroo Quote  Post ReplyReply Direct Link To This Post Topic: New Offshore Boat
    Posted: 21 Jul 2014 at 9:43pm
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I'm looking for some advice....

I'm looking for a new offshore boat, in the 7.5m to 9m range. Below are my criteria/thoughts:

  • Probably go for a diesel inboard, Merc/VW Diesel, any experience with these?
  • Aluminium hull - not sure whether to go for a pontoon, my reservations about these are the area lost with the pontoons
  • Lock-up weekender - need to be able to comfortably sleep 3 - 4, if this requires reconfiguring prior to bedtime, no problem
  • Like to be able to travel to Three Kings, Mokohinaus. 6mm bottom/4mm sides - is that what others would recommend for an offshore boat like this?
  • Will primarily be used for diving and fishing
  • Would like a gas hob and sink - with hot water, so guess I need a gas califont, although someone suggested I should use diesel for my hot water. If I was to do that, I still need the gas for the hob, or are there other options for the hob?
  • Potty and shower
  • I like the look of Whitepointer boats, but been having a look at some cheaper boats, such as the Bluefin and Profile - Any comments on the Bluefin and Profile?
  • Walkthrough transom
  • Thinking it would be a good idea to have a duckboard - will I lose too much deck length, considering I am already losing at the front with the lock-up?
  • Is hydraulic steering the go for a boat of this size?
  • Live bait tank
  • Freshwater tank
  • Any recommendations on fuel tank size, obviously bigger the better, but the weight compromise must come into consideration
  • Sliding side windows
  • Fridge
  • Capstan
  • Table and Chairs
  • Trim tabs?
  • Has anybody ever installed a dive compressor in a boat such as this?
Any comments on my above would be appreciated.
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Post Options Post Options   Likes (0) Likes(0)   Quote footey Quote  Post ReplyReply Direct Link To This Post Posted: 21 Jul 2014 at 10:25pm
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I saw this the other day. A lot boat for a good price. ( its not mine !)
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Post Options Post Options   Likes (0) Likes(0)   Quote green guy Quote  Post ReplyReply Direct Link To This Post Posted: 21 Jul 2014 at 10:28pm
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What a beast
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Post Options Post Options   Likes (0) Likes(0)   Quote footey Quote  Post ReplyReply Direct Link To This Post Posted: 21 Jul 2014 at 10:31pm
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It pulls the marlin also with a successful season out of Raglan this year
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Post Options Post Options   Likes (1) Likes(1)   Quote Tagit Quote  Post ReplyReply Direct Link To This Post Posted: 21 Jul 2014 at 10:43pm
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Originally posted by mattyroo mattyroo wrote:

I'm looking for some advice....

I'm looking for a new offshore boat, in the 7.5m to 9m range. Below are my criteria/thoughts:

  • Probably go for a diesel inboard, Merc/VW Diesel, any experience with these?
  • The Yanmars would be an option as well
  • Aluminium hull - not sure whether to go for a pontoon, my reservations about these are the area lost with the pontoons
  • In that size range I can't see why you would go pontoon
  • Lock-up weekender - need to be able to comfortably sleep 3 - 4, if this requires reconfiguring prior to bedtime, no problem
  • Should be doable OK
  • Like to be able to travel to Three Kings, Mokohinaus. 6mm bottom/4mm sides - is that what others would recommend for an offshore boat like this?
  • Big sea places like the Kings, weight is good. You are probably looking more at 9m than 7.5m boats though
  • Will primarily be used for diving and fishing
  • Would like a gas hob and sink - with hot water, so guess I need a gas califont, although someone suggested I should use diesel for my hot water. If I was to do that, I still need the gas for the hob, or are there other options for the hob?
  • LPG is simple and reliable. You could spend the extra on diesel appliances, but can't see why you would.
  • Potty and shower
  • Enclosed shower is a big space hog. Won't happen in a sub 8m boat with everything else you want and give a good layout
  • I like the look of Whitepointer boats, but been having a look at some cheaper boats, such as the Bluefin and Profile - Any comments on the Bluefin and Profile?
  • Walkthrough transom
  • With door
  • Thinking it would be a good idea to have a duckboard - will I lose too much deck length, considering I am already losing at the front with the lock-up?
  • Duckboard can be a pain for game fishing if that is why you are going to the Kings etc. Weigh up the pros and cons carefully
  • Is hydraulic steering the go for a boat of this size?
  • It is the only sensible option
  • Live bait tank
  • Don't forget the Tuna tubes if you game fish
  • Freshwater tank
  • Another reason not have a shower. Aim for 150l+ if you are staying away a lot. Even 250l isn't a lot if you are away for a few days unless no one washes
  • Any recommendations on fuel tank size, obviously bigger the better, but the weight compromise must come into consideration
  • Say you have a 250hp diesel, and cruise around 26knts. Fuel burn around 30lph. Trolling at say 7knts at 7lph. Houhora to Kings is ~80NM, so 160NM round trip plus say 2 days trolling at 10hrs/day. Fuel use assuming 50% cruising/50% trolling on way to Kings and back plus your 2 days trolling is around 320l. Add ~30% for safety (big seas and currents etc) then you want min of 400l, but 450l is better.
  • Sliding side windows
  • Fridge
  • Freezer as well?
  • Capstan
  • Table and Chairs
  • Trim tabs?
  • Must have
  • Has anybody ever installed a dive compressor in a boat such as this?
Any comments on my above would be appreciated.
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Post Options Post Options   Likes (0) Likes(0)   Quote Tzer Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jul 2014 at 7:59am
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Have a look here

http://www.fishing.net.nz/asp_forums/wp-840-pro-sportsman-20-nov-update_topic91712.html
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Post Options Post Options   Likes (0) Likes(0)   Quote Double Shot Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jul 2014 at 8:32am
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Originally posted by footey footey wrote:

I saw this the other day. A lot boat for a good price. ( its not mine !)


Was going to mention this one, hell of a boat, big biccies though
70ml of 90deg C water pressurised through 13g of roasted finely ground tamped coffee for 25sec's to make a distinguishing sensory hit called a Double Shot    
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Post Options Post Options   Likes (0) Likes(0)   Quote MikeAqua Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jul 2014 at 10:25am
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Hydraulic steering is the way to go/essential on a boat of this size.  If it was me I would go for electric over hydraulic.  Some of modern stern drives come with it as an option.  I've seen these installations work well in small commercial boats with busy helms - better then pure hydraulic systems.

6mm plate seems light for a 7.5 - 9m boat. Mine is only 6m and it has 6mm bottom plate with 4mm bulkheads and stringers and 4mm sides.  AMF use 8mm plate in the 7m+ size range.  Your engine block could weigh >300kg and you ultimately need to support that mass on the hull plates.

If it was me I would sacrifice a bit of deck space for a separate enclosed head.  If you are taking females out then obviously they prefer a bit of privacy. And even if it will be all boys few things are worse than one of the lads be-fouling the air within the cabin on a wet/cold day after a steady diet of pies beans and lager.

I wouldn't bother with a shower either.  Disposable fresh-wipes and rexona can tide you over for a few days easily.

LPG will run refrigeration plant as as well as the hob and califont.  Modern califonts are very efficient and safe.

An alternate  is 12v appliances.  Some of those mini-oven and hob combos are quite good but you can't beat gas for frying steak.

Dive compressor: If you are talking about filling your own tanks, quite bulky equipment.  Equivalent to at least 4 tanks in space. Generally require 240v electricity or a fuel powered compressor (?implications for air quality?).   Having seen what an in-cert dive tank did to a cinder block wall when it failed I would never have one on a boat.

If you are talking hookah then those compressors are compact and easy to use on a small boat.  You can even get 12v ones.  I've used Hookah on my boat.
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Post Options Post Options   Likes (0) Likes(0)   Quote mattyroo Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jul 2014 at 1:45pm
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Yes, I did see that one.

My problem with it is there is 40k of bling on it and as someone who is only in the country every other month, due to rotational work overseas, I find it hard to justify throwing that extra 40k at it for something that is not used nearly as much as it could be.

Still, I might go and have a look at it.

Thanks for the responses from the others.

I like the idea of the electric over hydraulic steering. I guess this means I could easily mount remote steering outside the wheelhouse too.

Ultimately, I do think I will be getting something more towards the upper end of my size range, rather than the lower end.
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Post Options Post Options   Likes (0) Likes(0)   Quote MikeAqua Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jul 2014 at 2:19pm
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Affirmative.  We put multiple stations on a 30m mussel harvester back in the early 2000's.    Steering a vessel with a tiny lever takes some getting used to but after that it's easy. You save space on the dash layout.  Simplifies autopilot control of steering too.

Just remember every remote steering station needs throttle gear controls too.  Shldn;t be major to have two cable controls on the same side of the boat, and there are elctric options too with some brands of engine.


Originally posted by mattyroo mattyroo wrote:

I like the idea of the electric over hydraulic steering. I guess this means I could easily mount remote steering outside the wheelhouse too.
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Post Options Post Options   Likes (0) Likes(0)   Quote JB Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jul 2014 at 3:26pm
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Hi, I'm probably going to the southland boat show in a couple of weeks to look at south island options for pretty much similar to your idea profile. Down here include Southern / Image / Mcclay in the non pontoon and stabi in the pontoon aspect.

Hopefully take some pictures.
regards
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Post Options Post Options   Likes (0) Likes(0)   Quote Don18025 Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jul 2014 at 4:30pm
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Matty roo, I like some of your ideas and will follow this project with interest.

I have a 9.4 metre woody with some 10 years experience.
I have 2 X 300 litre tanks, one for diesel and the other for freshwater on each side of the engine.
Owen Woolley the designer of my hull told me, "you will take the boys out for the weekend and use all the diesel and the next weekend you will have the girls on board and they use all the water." Owen was spot on...
 I am putting a new 260 l fuel tank in the back this winter. Tagit is right. I cannot safely do Auckland Mercs return without going in to Whitianga to top up.
Hot water put a heat exchanger on your engine - contact APT, they make the Rayglass ones.
I can squeeze 4 on board overnight, but 3 is ideal and more comfortable.
Separate toilet, makes a huge difference.
You do not need a shower inside, just have running freshwater on the back deck. No harm to anyone if showering outside - lots of boats do it, especially after diving. You peel of the wetsuit then have a freshwater washdown, dry and clothes on.
Always remember that the cockpit is sheltered from the weather when anchored.
I would like to see your ideas re a dive compressor - I have been thinking about it for sometime.

Besides a White Pointer, have a look at the Dickey Semifly....luxury as well practical beauty.
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Post Options Post Options   Likes (0) Likes(0)   Quote mattyroo Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jul 2014 at 7:07pm
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My thoughts around a dive compressor were to somehow use an electromagnetic clutch on the main engine, that would drive the compressor.

I would buy a small dive compressor and somehow fit it into the engine compartment, getting rid of the bulk of the weight of the compressor drive motor.

Not sure whether this is practical, but being a mech. engineer, I like to think something like this is totally achievable.

Re the Dickey Boats, yes, they're very smart, but as I said before a lot of dosh tied up that isn't used enough. Pretty hard for me to justify whilst I'm working offshore.
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Post Options Post Options   Likes (0) Likes(0)   Quote Time_Bandit Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jul 2014 at 8:23pm
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how much you looking a spending ?
“Be yourself; everyone else is already taken.”

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Post Options Post Options   Likes (0) Likes(0)   Quote mattyroo Quote  Post ReplyReply Direct Link To This Post Posted: 22 Jul 2014 at 8:52pm
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Try and keep it under 200 nicker, if I could do it for 180k, that would be good.
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Post Options Post Options   Likes (0) Likes(0)   Quote MikeAqua Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jul 2014 at 12:04pm
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I've heard of but never seen a scuba compressor in an engine room. They tend to be AC electric or self contained with an inbuilt petrol or diesel engine.
 
You would want to be quadruple sure none of the air going into your cylinders is coming from inside the engine compartment and you need to be able to get to the compressor for maintenance and inspection.

Containment of bottles during filling is a consideration. Structural failures are rare in certified bottles but if they happen can include flying chunks of alloy.

If you haven't already, maybe look into what is required to fill your own dive bottles.

http://www.epa.govt.nz/hazardous-substances/at-home/Pages/SCUBA-diving.aspx 

http://www.epa.govt.nz/hazardous-substances/certifications/people/approved-fillers/Pages/requirements.aspx
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Post Options Post Options   Likes (0) Likes(0)   Quote mattyroo Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jul 2014 at 2:24pm
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Easy enough to make sure the air going is in clean. Considering I work on offshore oil and gas rigs and their design, the technical complexities of this are minuscule.

Wasn't aware that you had to be approved to fill your own cylinders at home - the bureaucratic reach never ends in this country.

I know a number of people with their own compressors, who fill their own and others bottles, I'll guarantee not one of them is "approved".

I recently had a licensed gas fitter at my house, and he scared me, grinding next to a disconnected live gas line, with only single point isolation of a poxy cheap ball valve. I guess he was "approved" too...
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Post Options Post Options   Likes (0) Likes(0)   Quote MikeAqua Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jul 2014 at 3:12pm
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The reason for certification of 'home' compressors is serious and incidents resulting from people unknowingly pumping contaminated air into tanks, including friends' tanks and/or doing under the table fills for $$ and/or filling dodgy tanks.  Probably  if you are refilling your own cylinders without approval no-one would bat an eyelid.  If you fill for other people, and there is an incident I expect things would hit the fan

If you have worked on oil rigs then you will have seen the approach of competent commercial divers, and it certainly sounds like you have the skills to effectively maintain your own compressor.

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Post Options Post Options   Likes (0) Likes(0)   Quote Bossco Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jul 2014 at 8:38pm
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The first thing to decide is what size you need, there is a huge difference between a 7.5m boat and 8.5, even going from a 7.5 to an 8.1 meter opened up heaps of stuff for us.

Most of the 750's from the decent brands would just fall into your under 200k price range with an inboard, and you could tow them with a normal big suv. But at that size you lose alot of overnighting comfort and space. An 8.5 you would struggle to get under 200k with an inboard, and while you gain in space, room and seakeeping you lose out massively when it comes to towing it around especially if you are looking to make it up to the Far North and for the heavier models you will need a small truck.

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Post Options Post Options   Likes (0) Likes(0)   Quote mattyroo Quote  Post ReplyReply Direct Link To This Post Posted: 23 Jul 2014 at 9:15pm
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V10 Touareg chipped to 1000Nm should have the grunt...
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