Here's a good video explaining the tech these boats are using.
https://www.youtube.com/watch?v=l0BPAuGmx_Y&feature=share&fbclid=IwAR3qwmzP2m1rFHXVblNzG_TaUX3A9Ufn-3EtJavum_fs_RSiMk_ef1VdPLo
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