Inavx et Ais ?

J'utilise un multiplexeur shipmodul wifi sur lequel est relié un GPS et une vhf Ais ( rt550ais)
Je récupère bien le signal wifi et les infos sur l'ipad mais inavx n'affiche rien au niveau de l'ais
Voici ce que voit l'ipad. Avez vous une idée ?

[ $GPGGA,160022,4746.905,N,00340.173,W,1,1,2.1,1.6,M,0,M,,*43
]
[ $GPRMC,160027,A,4746.905,N,00340.173,W,0.0,000.0,080712,2.2,W77
]
[ $GPGGA,160027,4746.905,N,00340.173,W,1,1,1.0,0.9,M,0,M,,4A
]
[ $GPRMC,160032,A,4746.905,N,00340.173,W,0.0,000.0,080712,2.2,W73
]
[ $GPGGA,160032,4746.905,N,00340.173,W,1,1,1.0,0.0,M,0,M,,47
]
[ $GPRMC,160037,A,4746.905,N,00340.173,W,0.0,000.0,080712,2.2,W76
]
[ $GPGGA,160037,4746.905,N,00340.173,W,1,1,2.1,0.0,M,0,M,,40
]
[ $GPRMC,160042,A,4746.905,N,00340.173,W,0.0,000.0,080712,2.2,W74
]
[ $GPGGA,160042,4746.905,N,00340.173,W,1,1,1.0,0.0,M,0,M,,40
]
[ $GPRMC,160047,A,4746.905,N,00340.173,W,0.0,000.0,080712,2.2,W71
]
[ $GPGGA,160047,4746.905,N,00340.173,W,1,1,1.0,0.0,M,0,M,,45
]
[ $GPRMC,160052,A,4746.905,N,00340.173,W,0.0,000.0,080712,2.2,W75
]
[ $GPGGA,160052,4746.905,N,00340.173,W,1,1,1.0,0.0,M,0,M,,41
]
--> DISCONNECTED

---

--> CONNECTING (TCP)
--> CONNECTING FAILED

---

--> CONNECTING (TCP)
--> CONNECTED
\s:mch21D\$INZDA,160233,08,07,2012,02,0051

\s:mch21D\$INMTW,,49

\s:mch21D\$INDPT,,47

\s:mch21D\$INRMC,160234,A,4746.9041,N,00340.1722,W,0.1,26.7,080712,1.4,W53

\s:mch21D\$INDPT,,47

\s:mch21D\$INGLL,4746.9041,N,00340.1722,W,160235,A27

\s:mch21D\$INVTG,26.7,T,28.1,M,0.2,N,0.4,K50

\s:mch21D\$INMTW,,49

\s:mch41B!AIVDM,1,1,,A,13HO4JP000Oh>8hK@j@2CW9:0608,07E

[ $GPRMC,160237,A,4746.905,N,00340.173,W,0.0,000.0,080712,2.2,W74
]
\s:mch21D\$INDPT,,*47

\s:mch41B\$GPRMC,160237,A,4746.905,N,00340.173,W,0.0,000.0,080712,2.2,W74

[ $GPGGA,160237,4746.905,N,00340.173,W,1,1,1.0,0.4,M,0,M,,44
]
\s:mch21D\$INRMC,160236,A,4746.9038,N,00340.1722,W,0.4,26.7,080712,1.4,W*5A

\s:mch41B!AIVDM,1,1,,A,D02;bCPjlLfq6DM6EI0u6D0,277

\s:mch21D\$INDPT,,47

\s:mch21D\$INGGA,160237,4746.9038,N,00340.1722,W,1,06,1.4,-0.6,M,,,,38

\s:mch21D\$INZDA,160237,08,07,2012,02,0055

\s:mch21D\$INMTW,,49

\s:mch41B!AIVDM,1,1,,A,402;bCQuil@2WOgv;LKA5GA00<0a,073

\s:mch21D\$INDPT,,47

\s:mch21D\$INRMC,160238,A,4746.9038,N,00340.1722,W,0.2,26.7,080712,1.4,W52

\s:mch21D\$INDPT,,47

\s:mch21D\$INGLL,4746.9038,N,00340.1722,W,160239,A25

\s:mch21D\$INVTG,26.7,T,28.1,M,0.2,N,0.3,K57

\s:mch21D\$INMTW,,49

\s:mch41B!AIVDM,1,1,,B,13Il440P1FOg?k0K?@>I;wvn2<0D,034

\s:mch21D\$INDPT,,47

[ $GPRMC,160732,A,4746.905,N,00340.173,W,0.0,000.0,080712,2.2,W74
]
[ $GPGGA,160732,4746.905,N,00340.173,W,1,1,1.0,13.8,M,0,M,,7A
]