Plotting a route from Helsinki to Odessa

[230K]

Hi

I work in Ukraine 2 weeks a month and we are expecting a delivery from Finland via sea to the port of Odessa.

We have been told 20 days sailing time between the 2 ports and i wanted to check this.

Is there an equivalent to Google maps for the sea??? that i could even work out how far it is Nm and estimate a vessel speed to see if 20 days is realistic???

Can anyone help???

Mods if this isnt in the correct section feel free to move.

Thanks,

230K