See the attached map of our recent Pledge a Pint tour of the UK. The journey was live tracked by several devices so that base knew where we were at all times.
The following links will allow you look at any of these products which are reasonably priced.
https://explore.garmin.com/en-GB/inreach/
https://www.spidertracks.com/
Rock Seven | Truly global GPS tracking and messaging systems using Iridium satellite | RockAIR
Rock Seven | Truly global GPS tracking and messaging systems using Iridium satellite | RockSTAR
https://www.iridium.com/products/iridium-go/
https://www.iridium.com/products/iridium-extreme-ptt/
Hope something fits the bill for those of you seeking this type of technology.
NB. I am not specifically recommending any of these products, nor do I have any commercial interest in selling them - merely suggesting solutions to the requirement.