Ublox F9P Moving Base

Good Evening,

Regarding the RTK Surveyor package; https://www.sparkfun.com/products/17369

Its likely our project is going to require a moving base station which will be offshore & out of internet range so have the following questions;

Does the RTK Surveyor support moving base stations?

Can we use an alternative corrections to send? If so what sort would be suitable?

Can we hardwire the corrections as well as wifi for example a rs485 method?

The range required is around 300m with Good LOS. Would this be suitable? Would you recormmed a RTCM for the external corrections if its possible to interface them?