[myadvice]

Any engineers or electricians help welcome,

Our yacht (a New build) will be covering the areas below and I wish to know which Electrical power connections will be available in the projected sailing area of the yacht.
Is a power converter (for various voltages and frequencies) required or a relatively simple shore transformer sufficient.
The more harbours there are with an exotic voltage or frequency the more a converter will be required (last resort a generator has to run but can't do this long term.

There are quite a number of harbours and the question is what the available voltage and frequencies are.

It is expected that the yacht will need a shore connection of aprox. :
100 Amps: 3x 400V+Neutral and 50 Hz

Here is the harbour list:
(excuse me if the spelling is sometimes wrong)

Istanbul
Cairo
Beirut
Athens
St. Tropez
Porto Chervo
Palma de Majorca
Las Palmas
Barcelona
Puerto Banuz
Ibiza
Porto Fino
Naples
Croatia
Cathar
Dubai
Abu Dhabi
Copenhagen
Oslo
St. Petersburg

Or any ideas where this information can be found.

Best regards,
John