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Hi Vlad

I would suggest a 2kg bruce type anchor if you must drop something, I suspect you would be better off drifting.
Re fishfinder, I would attach the transducer onto a piece of wood, abot 2"x1" and make it have a lip over the top of the transom with a thumbscrew fixing to hold it in place.
The screen I would attach, again on a piece of wood that rests on the tubes but again is secured to the transom to stop it being lost overboard.
I would also suggest you get a sealed lead acid gel battery to run the fishfinder and keep it as watertight as possible as you don't want water shorting out at the terminals.

Not sure how you would fix rod holders.

Just my quick thoughts.

Dave
:)
 

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Discussion Starter · #3 ·
Thanks Dave!
Great advise about the batery!
I cannot picture the transducer fixing though - "and make it have a lip over the top of the transom with a thumbscrew fixing to hold it in place."

This is what I found about "thumbscrew":
http://www.frozencpu.com/images/products/small/scr-86.jpg

I cannot uderstand also this "lip over the top" but I am not very good at fixing things. Thanks anyway!
 

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I have tried to draw what I mean, so sorry for the poor quality :g:

Regarding the thumbscrew, look at the outboard fixings, they have x2 screw bolts with wing heads on them so you can tighten them up against the transom. Similar to a G clamp arrangement.

Make sure you have the transducer under the hull of the boat so not to get air bubbles around it otherwise it will not read correctly.

Hope the mud is clearing now. :)

Dave
 

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Discussion Starter · #5 ·
Now I got it!
Thanks Dave! It seems straignht forward.
Great help! Thanks!
 

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Vlad,

This may help you. I made up a sealed battery box for my inflatable and fish-finder and it's been working fine for the past 5-6 years. The current drawn by the fishfinder seems to be only a few hundred milliamps so a 7 Ampere-hour battery will last all day without charge.

Your fishfinder is probably 12V operation. If so, then .........

All the kit is obtainable from Maplin.

#1 Black ABS box mounted on a backplate which, in turn, mounts onto the inner face of the transom with
#2 a sealed Lead-Acid battery inside, padded with foam against vibration,
#3 For recharging on the boat - a Bridge Rectifier unit mounted inside the outboard motor housing using the AC supply from the motor's alternator connection to provide a 12 Volt DC output from the rectifier via
#4 a 2 or 3-core cable to the Battery Box.
#5 A 10 Watt 10 Ohm resistor in the Box and wired in one leg of the cable #4 limits charging current to the battery.
#6 At home/caravan a spare Laptop Power Supply can be used as an alternative power source (19V) to charge up the battery by connecting to #4 above.


Maplin.co.uk

12 Volt Sealed Battery
Code = MM26D 12V 7.2Ah SLA
http://www.maplin.co.uk/Search.aspx?criteria=MM26D&DOY=20m3


ABS box
Code = MB4
Internal Dimensions 208 x 122 x 81 External 216 x 130 x 85
http://www.maplin.co.uk/module.aspx?ITAG=SPEC&ModuleNo=1676&doy=20m3#spec


Bridge rectifier
KBPC2501 RoHS Code = AR84F
http://www.maplin.co.uk/module.aspx?ITAG=SPEC&ModuleNo=19088&doy=20m3#spec


Resistor 10W W/W 10R Code = H10R
http://www.maplin.co.uk/module.aspx?ModuleNo=2181&doy=20m3

PM me for extra info or my phone number to discuss.
 

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Here in holland they use often a transducerbar (dutch translation: transducerstang) on inflatables and bellyboats. The company Titel-lok makes the best tranducerbars according to a friend of mine. There easy to install and deinstall and quite strong. He also uses two bellyboat rodholders on the back of the boat (around the tube) he only uses those rodholder to store rods, not for trawling.

http://www.dieptemeters.nl/transducer_benodigdheden_tekst.htm
 
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