[anonu]

I had 2 questions: 1. what about data transmissions 2. what about using this on containers in the open seas?

The first questions is at least partly answered in the document, copied below. However, you still need a collection infrastructure to make this useful.

> Communicating locations: Localization trackers often need a communication module to periodically update location to a server or nearby hub. Standalone GPS trackers (e.g., [35] and [95]) often use cellular or satellite communications to do so. LiTEfoot can incorporate an NB-IoT module for relaying location data. Using a low-power NB-IoT transmitter [96], which consumes 76 mW to transmit a 140 kb packet in eDRX mode, the system can intermittently send updates hourly, daily, or monthly depending on the application. This enables LiTEfoot to operate for approximately 10 years on a coin cell. The same antenna frontend can be shared between LiTEfoot and the communication unit, maintaining a compact form factor while providing flexible communication capabilities.

[davidhyde]

There are many cheap ultra low power microcontrollers that can keep a time clock going and a small amount (say 32KB) of ram. 30 years on a coin cell. Pair that with a Bluetooth low energy transceiver to automatically transfer the data when the home base is in range (or any number of base stations). Like at a port in your example.