score:15
Partial response, feel free to complete/correct it:
First row:
1. Navy Occupation Medal
2. WW2 Victory Medal
3. European-African-Middle Eastern Campaign Medal
4. Asiatic Pacific Campaign Medal
5. American Campaign Medal
6. Good conduct medal
Awards:
Navy presidential Unit visitation
Republic of Korea Presidential Unit Citation
Second row:
1. China Service Medal
2. National Defense Service Medal
3. Korea Service Medal
4. United Nations Service Medal (Korea)
5. Korean War Service Medal
Upvote:4
The medal at the top/left (Navy Occupation Medal) is mistakenly showing the obverse. That is, the ribbon is okay, but the medal suspended beneath it is backwards. It should be turned around for proper display.
About the ribbon at the top/right (the red one with three white stripes at each end): That's an Army Good Conduct ribbon. Perhaps it was meant to be a Navy Good Conduct ribbon? If so, it should then be displayed above the Navy Good Conduct Medal.
The 'rope and whistle' is a Boatswain's Pipe with its lanyard. It could mean that your Step-grandfather had the enlisted rating of Boatswain's Mate (BM). BM's would usually make the lanyard themselves, so that may be an item hand-crafted by your family member.
Just so there's no confusion: If he was a Boatswain's Mate, he could still have been a Diver at the same time. Navy Diver didn't become an enlisted rating until 2006. So every enlisted diver also needed a rating in order to advance through the Petty Officer ranks.