Marine Electronics Forum - Airmar M260

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View Full Version : Airmar M260


Raider Ron
03-21-2012, 03:55 PM
The M260 is the yellow tank shoot thru and the 260 is narrow beam (6 or 19 degrees 50 or 200)
Anyone know if there is a tank shoot thru 1K wide angle ?
Considering a SS270W for it's wide angle (25 degrees in both 50 & 200) but wondering also if the tank shoot thru hull is an option in wide angle.
I've got a B260 now, awesome for deep water, not so much for shallow.
Thanks


mstyle8517
03-21-2012, 05:03 PM
I've never heard of one personally but I'm sure Gil will chime in with the final word. If you happen to have a Raymarine unit, I actually have a new in the box SS270W I can cut you an unbeatable deal on :thumbsup:

It may even work with other units - that would be a question for the folks at Gemeco.

semperfifishing
03-21-2012, 05:04 PM
The only shoot thru in a 1kw is a M260 .
On the bigger units like the R299 you can adjust to any freq between 33 kHZ to 60 KHZ and between 130 kHz and 21 kHZ ..thus changing your cone angle accordingly.


The Hat Island Pirate
03-21-2012, 07:08 PM
I understand your position Raider Ron. I ended up with one wide beam 1kHz and one narrow beam 1kHz transom mount transducers on my rig. For one transducer your best bet at this time is to go CHIRP as it pings at many different frequencies and beam widths. I am holding off on CHIRP until I can get one transducer that pulses between 35kHz up to 210kHz and to be able to adjust my beam widths to my preference. I hope I do not have to wait to long.:)

nicktg
03-22-2012, 03:49 AM
No in-hull equivalent of the SS270W.
I emailed Airmar with the exact same question and they said it is not technically possible (due to losses in the hull if I recall correctly).
There are though-hull (SS270W and SS264W pair) and transom mount (TM270W) solutions.

Another way to go is to add a single SS264W 200KHz to your boat, and pair it with your existing B260 with the SB264 switch (http://www.airmartechnology.com/uploads/brochures/sb264.pdf).

Raider Ron
03-22-2012, 04:37 AM
I understand your position Raider Ron. I ended up with one wide beam 1kHz and one narrow beam 1kHz transom mount transducers on my rig. For one transducer your best bet at this time is to go CHIRP as it pings at many different frequencies and beam widths. I am holding off on CHIRP until I can get one transducer that pulses between 35kHz up to 210kHz and to be able to adjust my beam widths to my preference. I hope I do not have to wait to long.:)



My position is in my opinion the my B260 is awesome for bottom fishing (cod,haddock ect... that we have here up in the NE and that is typically in 100-300 ft of water) but because of other types of fishing we do it's not so good, especially if trolling is involved, thats typically in less than 100 ft and as little as 20ft a lot of the time
With the narrow beam if the fish are not directly under your boat you don't mark.

nicktg
03-22-2012, 08:05 AM
What you describe is exactly what the SS264W 200KHz paired with your B260 was made for: Mark the fish with the B260 when bottom fishing, flip the switch (SS264W) and look for bait/predators in the upper column when trolling.
The best of both worlds!

semperfifishing
03-22-2012, 08:47 AM
My position is in my opinion the my B260 is awesome for bottom fishing (cod,haddock ect... that we have here up in the NE and that is typically in 100-300 ft of water) but because of other types of fishing we do it's not so good, especially if trolling is involved, thats typically in less than 100 ft and as little as 20ft a lot of the time
With the narrow beam if the fish are not directly under your boat you don't mark.

Before you add a second very expensive transducer here is something you might consider.
When you are under 100' are you using the dual frequency?

Even at 20' depth you should be using the 50 k side of the B260.
A SS264- 25 degree at 20' depth covers 9' across..
A B260 19 degree at 50 Khz covers 7' across.
Only 1' difference on each side.


http://a.imageshack.us/img850/329/dsc0219a.jpg

Here is a 260 at 47'..the cone coverage is 16' across..and as you can see from the left side of the screen( 50 K 19 degree).. it marks targets extremely well on the 50 K / 19 degree side.

Now..if you were using a SS264W at 47' depths the coverage would be a little wider..21' across verses 16'....but that is only 2.5 ' on each side more .
All I am suggesting is since you already have the B260... try the 50 k 19 degree side in shallow water to make use of its 19 degree cone...see how that works before adding a second expensive transducer that will only give a slight additional amount of coverage.


http://a.imageshack.us/img543/3313/b2601.jpg
A 260 has 7 elements on its 50 kHZ 19 degree side...very sensitive.


And if you still want to add a second transducer for optional coverage at depths less than 50'.... try the B60 because of its 45 degree cone.
It might be a good option for the second unit for shallow water use.
At 20' deep the SS264W's 25 degree cone covers 9' across.
At 20' deep the B60's 45 degree conce covers 17' across.
At 50 deep is is 22' vs 41'


The B60 far less money...$195 vs $825 for the SS264W.

nicktg
03-22-2012, 10:01 AM
Semper is correct (as usual),

I assumed you had already tried your 50KHz but was not satisfied.
No need to go spend money until you try it and see if it marks while trolling (it should).

chainsaw42
03-22-2012, 01:57 PM
Good explanation by Semper.

offshore3144
03-23-2012, 05:33 AM
I agree. I have used the B260 for years trolling in all depths and never have a problem locating fish. Another question.....Are you using your sounder in manual mode? If you are not you should it makes a huge difference with the B260.

Before you add a second very expensive transducer here is something you might consider.
When you are under 100' are you using the dual frequency?

Even at 20' depth you should be using the 50 k side of the B260.
A SS264- 25 degree at 20' depth covers 9' across..
A B260 19 degree at 50 Khz covers 7' across.
Only 1' difference on each side.


http://a.imageshack.us/img850/329/dsc0219a.jpg

Here is a 260 at 47'..the cone coverage is 16' across..and as you can see from the left side of the screen( 50 K 19 degree).. it marks targets extremely well on the 50 K / 19 degree side.

Now..if you were using a SS264W at 47' depths the coverage would be a little wider..21' across verses 16'....but that is only 2.5 ' on each side more .
All I am suggesting is since you already have the B260... try the 50 k 19 degree side in shallow water to make use of its 19 degree cone...see how that works before adding a second expensive transducer that will only give a slight additional amount of coverage.


http://a.imageshack.us/img543/3313/b2601.jpg
A 260 has 7 elements on its 50 kHZ 19 degree side...very sensitive.


And if you still want to add a second transducer for optional coverage at depths less than 50'.... try the B60 because of its 45 degree cone.
It might be a good option for the second unit for shallow water use.
At 20' deep the SS264W's 25 degree cone covers 9' across.
At 20' deep the B60's 45 degree conce covers 17' across.
At 50 deep is is 22' vs 41'


The B60 far less money...$195 vs $825 for the SS264W.



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