Why won't SideVü appear as an option on my echoMAP when using a GT40 transducer?

If you are using a GT40 transducer with an echoMAP x2sv, x4sv, x5sv*, SideVü will not appear as an option. The GT40 utilizes 455kHz and 800kHz for SideVü. The echoMAPs listed above only support 260kHz for SideVü. Since they do not share a compatible frequency for SideVü, the chartplotter will be unable to use SideVü.

*This is only true of versions of the echoMAP 75sv and 95sv preloaded with Canada LakeVü HD.