What range will I get from Nomad?

AIS uses VHF transmissions so range is limited to line of sight.  With the compact antenna you should be able to transmit up to 5NM and receive data from other vessels at 10-12NM.  Shore stations would typically pick you up at 25NM.

Connected to a mast top antenna will give standard Class B ranges of up to 20NM as the power output (2W) is the same as all other Class B AIS.