Some Garmin marine devices are able to display trip and total odometer readings though there is a limit to how many numeric characters can be displayed:

Garmin Chartplotters: Trip and total odometer are limited to 4 digits so the highest reading available is 9999.

GNX Displays: Trip and total odometer are limited to 4 digits so the highest reading available is 9999.

GMI 20: Trip and total odometer are limited to 4 digits so the highest reading available is 9999 except for when viewing this page in the powerboat profile:

GMI 20 Odometer Example