Seatalk to Garmin 740s?

hi all,

we have a bidata on our flybridge which is connected to seatalk. we also have a standalone garmin 740s. the bidata is having problems and i'd like to interface the 740s to the seatalk network to get depth data.

has anyone done this? if not, can anyone point me to a solution?

thanks in advance,

john (duetto)