Good point Lonesome, it reminds me of the Soviet Unions May day parades, where they had all the weapons on display.
Years later we learned that most of the weapons were highly designed cardboard and wood mocks.
So, like you, I wonder how many of those planes and boats are wooden replicas to make it look like they are highly armed.
After all, N.K. is in such a financial wreck that their actual worth makes Greece look like the Saudi’s royal family.
The satellite photos we have can only give so much definition, and even the highly technical photos we had of the Soviet Unions cardboard replicas fooled us.
Just sayins is all, it’s food for thought.
I believe the Brits did that for WWII to fool the Nazi's - lots of fake military staging.