Topic: Thru-Hull tranducer for 1197cx si

[Thani]

Hi All,

We are about to fix a thru-hull transducer in our Aluminum v-shaped bottom 50 feet boat. This boat has twin 550 hsp inboard and thus we think transom mount is not an option. I will to post a pic showing the propellers of the engines. I have few questions:
1) Is the plastic "XPTH 9 HDSI 180 T"  the correct transducer for the 119zxc si? Is there a bronze/metal  one available?
2) The boat stays almost all year in the water, it is almost a 14 ton boat, how can we protect and maintain the transducer from sea growth like algae and other harder growth? It is quite a lot here (in the Arabian gulf- Dubai, United Arab Emirates) due to the warm water. Can we apply antifouling on it without affecting the end picture quality?
3) The boat is V-shaped and it easies at back of the boat where the big engines are where we intend to fix the thru-hull transducer, would the engine vibration affect the quality of the image/returns?

I appreciate your immediate answers since the boat is being dry docked this week.

Best Regards,
Thani Alzaffin

[Jolly Roger]

Marhaba Thani,

I think a single transducer on a deep V hull will be tricky to install to get clear shots to both sides.
I would rather go for a dual transducer solution with a splitter cable.

Concerning the algae and other stuff, I would not apply antifouling. The picture quality will suffer from it.

I would also try to avoid any vibrations as far as possible.

Marsalama and Greetings from Germany
Harry

[keizerh]

We'll be trying 2 tru hull transducers on a single propped 38 ft inboard Offshore Procharter with a 1197 head.
System is expected to arrive early august.
Trying wil not start earlier than half august.

hendrik

[Thani]

Hi guys Marhaba

Thank you for the replies. I really appreciate your input. I have to get this transducer fixed correctly and it is one in a year opportunity for me. I am posting few pics to show where I am suggesting to fix a one transducer on this v-hull. The plan is to make a bulge/projection so the transducer lies horizontally and not obstructed by the hull. The best location is just in front of another sounder - Furuno ch-250. This seems to be the best location hence the back half of the boat is cluttered with other projected objects - see pic please where I put a yellow polygon to show the place. 
Do you think this will work? Or do I really need two separate transducers - one on each side?

But now I am faced with the other worry: will the other furuno sounder interfere with the SI sounder?

awaiting your replies eagerly.

[Jolly Roger]

Hi Thani,
hm, looks pretty complicated.
Using a bulge/projection will certainly give you clear shots to both sides, but getting the transducer adjusted will be the challenging part to do.
I understand that you want to use the Furuno as well, right?
That might cause interferences if the Furuno uses the same frequencies as the HBird.

Can you post a picture of the stern of the boat?
Maybe a twin ducer and a splitter cable solution at the stern might be a better solution.

Regards from Lake Constance
Harry

[Thani]

Hi Harry,

Thank you for your prompt reply. I am trying other forums as well as I am desperate for an answer but you were the first to reply. Thanks
Yes the Furuno is needed it is really a good but complicated fishfinder (the one we have), it can operate at these Choice of frequency: 60, 88 or 150 kHz. The transducer can be lowered out of the well/hull for a circular motion and a 360 degree scan.

Unfortunately the only pic close to the stern I have now is the first one I posted of the propellers in the first post. I can not fix anything on the stern because of the propellers and its shafts.

If 2 transducers are the only solution, I can opt for it. But, how good is the image returned from such setup? is it tricky to fix?

Talk to you tomorrow as our clock is showing 1am.

Regards,
Thani

[Jolly Roger]

Tisbalachair!
CU tomorrow
Harry

[keizerh]

Why no use the same principle as the furuno searchlight?

Standing pipe well above the waterline through the bottom of the hull.
Retractable inside pipe with bottom.
Mount the tru hull ducer on that botom of the pipe and you're ready.

Lowering the ducer far enough to look under the keel, just as you do with your searchlight.
Hoist the ducer up to level it with the bottom to do 2D scanning at higher speed.

hendrik

[Thani]

Hi keizerh,

I wish I could. The boat has double decks/compartments and the lower one is closed. Only few areas are reachable like the engine rooms and storage. The Furuno was installed when the boat was being built. You can lower it via a touch of a button, it is totally automated. Actually we are going to drill a hole in the boat to fix the thru-hull transducer.

Incase We had to fix TWO transducers - one on each side, will the HB device treat it as one? Can we see both sides of the scans at the same time without manual switching with the Y cable connector?

Regards,
Thani

[Jolly Roger]

Incase We had to fix TWO transducers - one on each side, will the HB device treat it as one? Can we see both sides of the scans at the same time without manual switching with the Y cable connector?

Regards,
Thani

Yes the two transducers will be working as one, since the right transducer will only deliver its right SI channel and the left one the left channel. This will be performed by the splitter cable (part number here: http://store.humminbird.com/humminbird-products/accessories/cables/as-silr-y/prod720056-1.html )

Marsalama
Harry

[keizerh]

Not so nice that there is no hatch to inspect the "closed" compartments.
I hate them, when they are not fuel or watertanks.

Yep, that is how it will be like under the cathedral hull of the Offshore Procharter as well.
hendrik