Rendezvous has multiple tracking systems aboard. Most of them are on all the time, but some only really show useful information when I am on a trip.
Automatic Identification System
Automatic Identification System (AIS) is a VHF radio based broadcast system that allows individual boats to share their location with base stations. I am a mobile base station myself, and gather data from other boats within my antenna range.
AIS requires a base station with an internet connection to work reliably. If my internet connection is not reliable, then I rely on a base station somewhere else picking up my VHF broadcasts. As a result, this position may not be 100% accurate or current – check the time stamp.
Iridium Go Satellite Tracker
I have an Iridum Go on almost all of the time, and it sends out a location every hour or so via satellite. You'll also get to see the current wind and weather conditions around me.
You can also go directly to https://forecast.predictwind.com/tracking/display/MV_Rendezvous to see a full screen version
Garmin inReach Satellite Tracker
I use a Garmin inReach Explorer+ while on longer trips. This sends out tracking data every 10 minutes using satellites, so it works just about anywhere.
You can also go directly to https://share.garmin.com/SteveMitchell to use a full screen version.