Seaker is a small trackable boat—a constructed model boat or a readymade toy boat—that
can be waterproofed.
The key components for tracking are a GPS, transmitter with antenna, solar panel,
and high-powered batteries, as used in Making Seaker.
There are multiple ways to combine electronic equipment to achieve the goal of making a
small boat trackable.
You could use a simple GPS tracker with lithium battery for short-term tracking. For longer
tracking time, you could use a microcomputer, such as a Raspberry Pi, an Arduino, or a
TTGO GPS with ESP, along with a shield development board like a SIM900 GSM GPRS,
with solar-powered batteries. (Equipment is rapidly developing, so what’s mentioned here is
likely already outdated!)