I have 2 Humminbird external antennas on my boat. One of them on the bow used to mark locations found on my trolling motor ducer. The other on the back starboard corner connected for marking locations from my transom ducer.

Bow puck says "AS-GPS HS Precision GPS+Compass" on top of it.
Back puck says "Precision GPS Module" on top of it.

I have 4 networked Helix 10s and understand to mark a waypoint with antenna closest to transducer being used. I was curious if these 2 pucks do different things or have different capabilities that could help me better understand my network?