diff --git a/gnss-converters.cabal b/gnss-converters.cabal
--- a/gnss-converters.cabal
+++ b/gnss-converters.cabal
@@ -1,5 +1,5 @@
 name:                  gnss-converters
-version:               0.1.0
+version:               0.1.1
 synopsis:              GNSS Converters.
 description:           Haskell bindings for GNSS converters.
 homepage:              http://github.com/swift-nav/gnss-converters
diff --git a/src/Data/RTCM3/SBP.hs b/src/Data/RTCM3/SBP.hs
--- a/src/Data/RTCM3/SBP.hs
+++ b/src/Data/RTCM3/SBP.hs
@@ -60,11 +60,11 @@
 toLock :: GpsL1Observation -> Word16
 toLock _l1 = 0
 
-toSid :: Word8 -> SBPGnssSignal
-toSid sat = SBPGnssSignal
-  { _sBPGnssSignal_sat           = fromIntegral $ sat - 1
-  , _sBPGnssSignal_band          = 0
-  , _sBPGnssSignal_constellation = 0
+toSid :: Word8 -> GnssSignal
+toSid sat = GnssSignal
+  { _gnssSignal_sat           = fromIntegral $ sat - 1
+  , _gnssSignal_band          = 0
+  , _gnssSignal_constellation = 0
   }
 
 fromObservation1002 :: Observation1002 -> PackedObsContent
diff --git a/src/SwiftNav/SBP/RTCM3.hs b/src/SwiftNav/SBP/RTCM3.hs
--- a/src/SwiftNav/SBP/RTCM3.hs
+++ b/src/SwiftNav/SBP/RTCM3.hs
@@ -1,3 +1,5 @@
+{-# LANGUAGE LambdaCase #-}
+
 -- |
 -- Module:      SwiftNav.SBP.RTCM3
 -- Copyright:   Copyright (C) 2015 Swift Navigation, Inc.
@@ -16,5 +18,23 @@
 import Data.RTCM3
 import SwiftNav.SBP
 
+fromMsgObs :: MsgObs -> Msg1002
+fromMsgObs _obs = Msg1002
+  { _msg1002_header = undefined
+  , _msg1002_observations = undefined
+  }
+
+fromMsgBasePosEcef :: MsgBasePosEcef -> Msg1005
+fromMsgBasePosEcef _basePosEcef = Msg1005
+  { _msg1005_reference = undefined
+  }
+
 convert :: SBPMsg -> Maybe RTCM3Msg
-convert = undefined
+convert = \case
+  (SBPMsgObs msg _sbp) -> Just $
+    RTCM3Msg1002 msg' $ toRTCM3 msg' where
+      msg' = fromMsgObs msg
+  (SBPMsgBasePosEcef msg _sbp) -> Just $
+    RTCM3Msg1005 msg' $ toRTCM3 msg' where
+      msg' = fromMsgBasePosEcef msg
+  _sbpMsg -> Nothing