Hi there. Thanks for your edits and the addition of the service roads inside the port.

I'd like to discuss the following deletions/changes:

a) The POI node 9671880818 with amenity=coast_guard was deleted and instead the amenity=police was added in the building.

Why is this change needed? There is already a used tag for coast guard (https://wiki.openstreetmap.org/wiki/Tag:amenity%3Dcoast_guard). It has a proposed status, but it's used in other coast guard POIs in Greece and abroad and it's more appropriate for this POI kind. If the change was done, because the amenity=coast_guard doesn't get an icon in some maps, but the police one does, I'd suggest having a read of this: https://wiki.openstreetmap.org/wiki/Tagging_for_the_renderer

b) The port's landuse tag value was changed from landuse=industrial back to  landuse=harbour. You basically reverted to the 1st version that you created it. I had changed the tag to landuse=industrial because that's the recommendation on the wiki page of the tag (https://wiki.openstreetmap.org/wiki/Tag:landuse%3Dharbour) "Consider using rather landuse=industrial with industrial=port providing the same information in a structured way.". I have also checked how ports are tagged in other locations, and most of them use the suggested tag combination with landuse=industrial.

c) For this one, I'm less sure, but should the road inside the port be classified as secondary highway instead of just be a service road? What’s the reasoning for this change?

I look forward to your comments, fellow Corfu mapper :)