Commercial Fishing Sailboat

There is something to look at Micheal see; www.kansaifishing.co.nz
Modern, viable, and very clever in conception.
Longline operation is completely different and requires a different approach in effect as a fishing method. Just ask if you need to know!
Rodney

 

Hello MickT,
Trolling Tuna and Longlining are totally separate fishing methods and not that compatable for effective working of one vessel. It can be done but one set up makes working the other harder to work.
Watch this space though www.kansaifishing.co.nz and the combination will appear in due course in a separate page in the not too distant future.
Maybe make contact and I will clue you in IF you really want to know.

Cheers

Rodney

 

Fishing Funnies

I just had to inject this joke I hadn't thought of for quite some time...a little smile during this conversation of work and play

And there is another very funny fishing joke just after this one over on that subject thread

 

Sail Assisted Fishing

Hello Rodney, and wecome to the forums
I've long had an interest in this subject, and last night a fellow forum member made me aware of your new website and forum contribution. here is a page from my website:
http://www.runningtideyachts.com/gamefishing/

Your rig looks somewhat similar to mine, but I can't tell if you are carrying two headsails or not?
Here is more discussion on that concept.
http://www.boatdesign.net/forums/sailboats/aftmast-rigs-623.html

My vessel is more recreation oriented than yours. I wish you the best of luck with getting it into real time. If you want put a posting of your vessel over on that aft mast discussion thread (but you might have to put up with a lot of gaft as I've had to

I posted a reference to your website last night on this subject thread:
http://www.yachtforums.com/forums/general-catamaran-discussion/1548-gamefishing-sail-under-sail-power.html

I think MickT would do well to consider a cross between Rodney's concept and Tad's excellent experience and vessels

 

Thanks Rodney........I can't find any dimensional information (other than the 29m number? length overall perhaps?) on your site?

Frankly the whole idea of being up high in a pilothouse with tiny windows and a sail blanketing 1/3rd of the horizon frightens me.....movie cameras on the masthead?

 

Offshore Tuna troller

I received some good feed back and contacts during the night here. Thanks.

Rodney

 

Hello Tad,
yes the 29 m refers to the LOA.
Interesting approach in your statement re tiny windows and sail restricted vision. How is this different to any other yacht I wonder? The all round vision in the real vessel will be awesome rather than as shown in what you have seen. No forward facing windows in the lower level at all though.

 

Refrigeration Efficiency

Does that mean you have an extensive knowledge of and experience with refrigeration?

If so what do you make of this refrigerate info?
http://www.globaldensoproducts.com/cc/ec/ejector_cycle.html

In 2003, DENSO introduced the world’s first refrigeration unit with an ejector cycle for mid- and large-sized trucks.
The newly developed ejector cycle is a high-efficiency refrigeration cycle with a significantly improved energy consumption efficiency, achieved by using a small injector called an ejector. The refrigeration units with the ejector cycle increase energy consumption efficiency by 50 percent compared to previous models

...thought you might find it interesting considering the amount of refrigeration you may need.

 

If I had extensive knowledge, I wouldnt need to be studying . I've got quite a bit of experience, but the technology changes often. There are some people that would question DENSOs claims.
I'll bring this thread back when i've got some time to run some numbers, but i'm leaning towards a water ballast type deal such as on the Dix cargo, because with a centrifuge they could be used for fuel as well. It seems alot of lead keel hulls could be modified too this kind of setup. But right now I cant contribute enough to make it a good conversation. If anybody has suggestions about types of rigs for me to sail on to get a feel for the different rigging options I would love to hear them. Thanks again for all your advice.

 

The best way to appraoch the rigging layout would be for you to scetch your Ideal deck layout for fishing. The ergonmics of an easy to use fishing boat. For instance I can see from Kanfish's boat that he values " high up " wheelhouse visabilty and a clean working foredeck. Also the windage of KAnfish's rigging is aft..this would make the boat easier to slowly motor into the wind while fishing without the bow blowing off.

 

From an economic standpoint (fishing and fishboats being a business proposition) you must look at cost/benefit. The rig should be matched to the performance possibilities of the hull, the whole is a system. Putting a highly-loaded and expensive yacht rig on a fishboat hull will not get you to windward with the 12-metres. The hull, keel, rudder, rig, stability, and prop power and drag must all be considered together.

How are you going to deal with heel angle? How much are you going to alter the ideal working and living areas to be able to move around when the boat's heeled? Rig loads are based on the vessel's stability (a function of her displacement), fully loaded stability will be huge and the high-tech rig must be sized to suit....this is senseless as performance will be abysmal at this load condition. So you build a huge/heavy rig for the overload condition which you never sail in.......

Personally I would favour a low-tech, non-yacht approach to the rig design and engineering. Short spars and short headstays with more smaller sails, spread over the length of the ship to offer better balance options will be far cheaper and more versatile. A shorter rig means less heeling and less worry. On our last tuna trip in Temujin (54'steel schooner) we set the main at the beginning of the trip and forgot it for a month or so.......

 

Of course, sounds entirely logical to me. stubby, low windage,, robust, easy to handle, low tech rigging, on a slippery hull shape ,capable of efficient motor sailing. What I find difficult is a short boat achieving...6000 miles range , long endurance with cargo ability. Logic says that a long range, slippery, efficient, easy to handle boat would be ...long. Are there regulations or considerations that prohibit a loger boat ?

 

Sail assisted fishing.

If I may join in again here re sail assisted fishing vessels.
I have tried to address pretty much everything as mentioned so far ie; minimal angle of heel with a low powered sail assist rig that breaks up into what ever is required to keep the heel angle minimal and constant if working the vessel. Balance of this rig just with No 2 headsail set or perhaps just mizzen set full or reefed. Full Mizzen and No 1 headsail would work well for passage making over distances. 15 degree max heel would be enough before reducing sail.
I addressed a Yacht hull underwater BUT fishing vessel type hull above water that carries load really well as the fish room fills with BALLAST weight in addition to fuel carried in very wide keel tank too as part of the ballast system.
Working the vessel to only have basicly one headsail to attend sheeting of most of the time would be fantastic thinking about so much work normally required to sail any other rig. Full time job on any ' Yacht' trimming and changing sails.
Sail assist in this case has a huge bonus taking load off engines, reducing fuel use and all the benifits that go with this.
However it is only trolling lure fishing that I see has any really place using sail in almost any form in commercial fishing so restricted to this method pretty much as I see it anyway.
Fantastic response to my first up notification of this sail assisted vessel design so far thanks all. See; www.kansaifishing.co.nz
There is a lot of information there if you take the time to read all pages on the site. Cheers

Rodney

 

Sail assisted fishing.

Can I also comment on the ' Concept ' of my sail assisted design here perhaps too.
As drawn in fishing mode this is a ' Specialised ' offshore Albacore troller.
There is a reason for everything I have drawn in here ie height of helmstation and clear viewing of trolling lures for instance as one example. There is no substitute for having good vision down onto trolling lures. Lures flip over and catch on themselves occasionally, pick up weed or anything and render themselves useless as a catching tool plus others close by. Total vision of all gear all the time when working is paramount to effective operation, So many vessels are ' converted ' to different fishing methods from what they where originally intended for and just ' Do not work ' as effective units. Very frustrating and I made the effort to , as I said , design the ultimate Albacore trolling unit.
So much more here too but you would probably have to be a fisherman to get the idea.
As to cost of this rig I could mention too re cost benifit of sail of this unit here.
Very inexpensive! but you would have to make your own inquiry for me to open up on this one. I would love to have any number of these vessels built all over the world and working to supply top quality , selective catch only, sustainable product to market.

 

http://www.georgebuehler.com/Melquiades 50.html