WSPR Sailing ON the Atlantic

I am planning to use WSPR TX on 20m whilst sailing a 13.7m / 45ft boat across the Atlantic starting in the Caribbean in late March, UK by early May 2017. I will run tests from home then in the Caribbean. Call will be G4HSO/M on the water (/MM not technically possible). G4HSO when at home in the UK. 73 Peter G4HSO