Here is the E-mail i sent to Airmar.
Have been looking at the Furuno 585 with your TM270W 1000 watt transducer.
I like the wide beam but have concerns.
Swordfish in our fishery Southern california tracking indicates they are 750' through 1050' during the day and at night near surface.
I am primarily intrested in looking at the scattering layer not the bottom and track the scattering layer influenced by light levels as it rises and falls every day.
This is where the swordfish are primarily at here.
Would this be the best selection ?
I usually troll at 1-2 knots not any faster.
If the wide beam will not work for my needs should i use the 660 smaller beam and save some money or is there a better unit or transducer system ?
I curently have a Raytheon V820 500 watts and Raytheon V850 600 watts and am not seeing the scattering layer as defined or as frequently as desired working the gain etc.
Hope you are abble to advise me on thease questions they have been dificult for me to understand and appriciate your advice greatly.
Keith Poe 310 562 6205
Any help from anyone else please chime in, thank you Keith
EDIT Ok guys found this and looks like it answers my questions and will wait for Airmar to respond, hopefully in detail but still would like to hear from anyone who has experience especially tracking the scattering layer accurately using all the feature etc.
Have extensively tried using the 600 watt sonar with a supposed 5000' range with out success using all the feature zoom etc.
Most of my targeted predators to date have been relatively shallow water being abble to primarily use visual indicators of their presence day and night gyros & bioluminescence but sword fishing in our fishery is causing me to expand my effort.
Here is the link http://www.airmartechnology.com/2009...RID=1259111640