February 26, 2009 07:02
Looks like the 41BT is no longer offered by ShipModul- there are probably some still available from stock. The basic difference between the 41 and the 42 is the lack of filtering capability with the 41. For integration into a Raymarine system, I would recommend the 42. While the Raymarine gear supposedly recognizes sentence types and won't resend any duplicates, I've found that to NOT be the case and it is easy to create feedback loops. Filtering solves that problem. GPSNavX has a neat piece of SW that will run the ShipModul muxes.