[DG11] Sonarchart Live, depth offset

[Derek - Raymarine - Moderator]

Hi Moki38

We have checked into this with the current AXIOM software and I hope I can explain this for you.

Lighthouse 3 works slightly differently to Lighthouse 2 and this was why I confused the issue - apologies for that.

AXIOM displays the 'System' depth on the digital display shown on the screen AND on the Sonarchart live graphical display. So when the i70 is set as a system data master, the offset applied to it is used in the AXIOM and is also applied ( As you correctly said) to the Sonarchart live - hence the red Sonar trail generated on the sonarchart live graphical display.

On the AXIOM, you can set a -ve offset, to identify a depth under the keel, however, to try to make this easy (!) we call it a keel offset and dispense with the -ve annotation, just displaying a +ve integer but applying the -ve value 'behind the scenes' to apply the offset correctly.

With your situation, one possible option is to select the AXIOM Sonar as the data master - this will then use the Sonar data throughout the network.

Alternatively if you wish to set separate depth offsets and use the DST800 you would need to isolate the AXIOM from the rest of STng and operate the AXIOM with one preferred set up and the i70 with the other - this would likely be more confusing, but you may prefer that?

Does this help at all?

Thanks
Derek