PayPal: View Cart Nautic Laugic for Nautique 1985 - 1999 Airguide 2025 Speedos. It’s not complicated to disassemble and pull the pressure-mechanical Innards out. and upgrade to GPS. 2012 - 2015  Gauges: Display The upgrade is directly applied at the Paddlewheel. Simply part the PW connector... Insert the NL4-NT  Inline between the PW connector halves. 1976 - 1984 Airguide 725 Speedos. It’s not complicated to disassemble and pull the pressure-mechanical Innards out. and upgrade to GPS.