Forum Replies Created
Hey mate I have furuno 1100l and run a 50 and
200 kHz 2 kw rubber trannys on a 7 m platey and
can see fish 600 m off Brisbane no worries at all
Hi Matt, Been at sea so sorry for the delay in
replying. The 82-88 tunable transducer was from
It seem to lack power and did not seem to be able
to separate feed just above the bottom, feeding fish
and reading bottom softness/harness was not as good.
I guess I got spoilt with 38 Khz@ 3 Kw.I prefer
38 Khz as the sound cone on the bottom is smaller
than that of 28 Khz. This limits the interference
caused by reflected echos and ghost readings on
uneven and very steep bottom. We can still get
feed and fish on near vertical and fast dropping
walls and have learnt which are real soundings
and which are ghost images. I hope this helps.
Hey Zane, I have had swordfish chase a line of blue
eye to the boat late in the afternoon, all lit up
and aggressive, but i have never caught one bottom
fishing. I use 38 KHz as the sound footprint is
tighter than 28 Hz and you don’t get as much side
load scatter and interference on near vertical
bottom. When I was long lining for swords in the
same area we used to catch plenty of them with the
remains of reef fish and dogsharks in their guts, indicating that they were feeding close to the
bottom during the day. Also, an autoliner that
worked the same area used to catch the occasional
swordfish on his bottom set gear so we know they
are in the area. It’s just that in the time it
takes to fish and catch a swordfish, I can catch
more blue eye worth a lot more .I have never marked
one on the sounder as I have my sounder set on
40/80 fathom range and Shift. Bottom lock is set
so I’m just scanning the bottom 15 fathoms.If you
catch a good sword, email me a photo. Good luck.
You never left your details.
Seems like we are definitly in the same business.
I enjoy the challenge of doing something different.
Not many fisherman have the patience and skill to
succeed deep water fishing.
All those hours of bottom mapping get paid back
bigtime when you find something unmarked on
charts loaded with fish that have never seen
a hook before.
We sell Flames whole Iki -Jima ice Slurry for
the equivalent of US$6.00/lbs
BlueEye and Bass groper H+G US$7.00/lbs. The
heads are popular with Asian restuarants and
we get US$4-6.00/lbs.
I have checked out the Gulf of Mexico on Google
Earth and there looks to be some very interesting
bottom with canyons, rough bottom and steep
Looks like there should be good stocks of fish.
As it’s a long way offshore, doesn’t look like
it gets a lot of fishing pressure.
Would love to have a look there someday.
Gold Band 40-100 fathoms
Flame Snapper 120-200
Bass Groper 150-350
Blue Eye 150-450
Rosy Jobs 50-100
Canyons are a good place to start and as you get to
know the area, other features will be found. Any
small drop off or pinnacle will hold fish at some
time. I have 3D mapped 100’s miles of coast and
found most features with fish on them. The trick is
not to fish them too hard and give good producing
areas time to recover.
I tried a dual frequency sounder with 3 Kw@38 Khz
and a tunable 82-88Khz.
After using the both I just stuck with the 38 Khz
as with the 82-88 as the picture was not as good.
I can get a bottom reading at 15 kts in 1200 fathoms
with my current sounder and fish life down to 800
fathoms. That’s good enough.
Over summer when the EAC runs strongly down the
continental slope, I work wider out on the seamount
chain. The weather is also more stable and predictable
to be 180 nm off shore.
In winter when the current slows down, I work the
shelf area. There are canyons all around the coast
and most occur offshore from major rivers. Canyons
are where ancient rivers cut through the Earth’s
crust in an past geological age. Sediment has
filled in most of the river bed inshore, but along
the slope, strong ocean currents prevent this.
Along the 100 fathom line is also the remains of
ancient sea cliffs. Where sediment has not covered
them they exist today as a rocky terrace dropping
off to into deep water.
On some parts of the coast, it is possible to
follow this terrace for many miles.
With patience and good electronics, you can find
these areas. As it is mostly out of range of most fishermen, there are still good stocks of fish
- This reply was modified 9 years ago by Jo Rowley.
Blue Eye and Bass groper are caught in similar depths although BG prefer rougher bottom.
Harpuka are higher up the slope.
Most of the time we fish marks. If I find some good structure without marks , it is always worth a shot. Sometimes the fish might be holding close to the bottom where they don’t show up and when you start catching them ,they burley themselves up into a school with all
the bait falling off the hooks and by emptying their stomachs when they get hooked. It doesn’t take long for a bit of excitement on the bottom to get something
Ken, the DSC wiil show up during normal soundings. I
have the sounder on 80 fathom range and shift it to
show the bottom in 300 fathoms. I have the gain on 5.
The DSC will be around 250-350 fathoms during the
day and is concentrated around canyon walls and sea
We often follow this layer onto the sea-mount and
fish at the depth that it touches. There are
usually fish feeding on it and we often get fish
with red shrimps, fang tooth dragons, light fish
and angler fish and long black eels in their mouths.
I use a split screen to show normal and bottom lock.
The normal sounding shows the depth and structure
and confirms the 3D plotter image, and bottom lock
flattens out the bottom to show schools of fish
holding on very steep bottom.
Screen shot of 3 KW at 38 Khz in 255 fathoms on
bottom lock on daylight showing the deep scattered
layer descending towards the bottom. The red marks
at the bottom of the layer are a school of Blue Eye
Trevalla feeding on the descending layer. Caught
2.5 tons in 2 hrs.
The heads are worth money and the fish keep better
with their heads on.
We put the fish in an ice slurry and if you don’t
remove the airbag etc, they will not sink.
We leave the heads on all our fish. Some fish are
headed before being sold and the heads sold
The fish are transported fresh chilled, packed in
ice to the wholesalers.
They are iced the whole time and if handled this
way, the buyers know they will have a 10 + day