We had the female side of the shown plug
on our EU built boat - but I suspect your 'standard' is a blue plugwith 3 round connectors? Usually for 220v at 16 amp.
This 'standard' EU plug
will do you in most Caribbean
countries but just like marinas
everywhare you will find variances.
We've parked up where they only have three pin 32 amp, five pin 32 amp, in other places 3 pin 64 amp, and English
had sockets so large they could only be 128 amps..........
We ended up carrying adaptors for 16 to 32, 32 to 64 etc etc, but never got the largest one as it cost US$250 and we never saw it anywhere other than Antigua
But be happy, as most marinas
also carry conversion / adaptors so your plug can fit their socket. Most hire these out - so it is not worth worrying unduly about buying
until you get there.
Except if you aim to go onward to the US.
Be aware most US marinas run on 110 volts as opposed to our EU standard 220/240 volts.
So a charger
that automatically adapts (as ours fortunately did) is also something to consider.