{
    "context": "vessels.self",
    "websocket.connectionkey":"d2f691ac-a5ed-4cb7-b361-9072a24ce6bc",
    "reply-to":"signalk.3202a939-1681-4a74-ad4b-3a90212e4f33.vessels.self.navigation",
    "subscribe": [
        {
                    "path": "navigation.speedThroughWater",
                    "period": 1000,
                    "format": "delta",
                    "policy": "ideal",
                    "minPeriod": 200
                },
         {
                    "path": "navigation.logTrip",
                    "period": 10000
                }
        ]
}