sandwich vs single skin hulls

I have an interest in cored laminates that is also non-marine in nature.
The bonding process is so critical and seems fraught with process failures.
Below is a photo of a helicopter blade delaminating. I only bring this to the discussion since if the aviation side still has issues getting it right with all the regs and process audits, how solid do you all feel about those processes in the marine manufacturing sector?

http://www.bluetonguehelicopters.com.au/pprune/cairns.jpg

In hull cores you don´t use honeycomb normally so I think they can not separate like that. Inside however there is an increasing use of glue instead of fibreglass to assemble the boat, which we don´t know how long it will last.

But on the other hand, most passenger planes are not using rivets but are also glued together these days...

Darn those illegal laborers, I thought I told them to use more, not less glue!

Fact is, you can't get kids away from the video games long enough to teach them a real work ethic these days. I was sure I had a good, strong handle on this silly home theater niche, until I went through 11 shoddy 'trainees' in a row. Now I see why they charge $125.hr for computer repair. It's to cover their other 40hr work weeks that went unbilled!

I love the sarcasm... ...some PVC foams also carry USCG approval as bouyancy foam as they easily pass the requirements...

Metal Bond

From The picture it looks like poor surface prep on the aluminum in the overlap. This is why PAA processing was developed. This area is prone to peel loading and bondline corrosion due to its location on the leading edge pressure side. If it were poor resin flow it would not have bonded to the aluminum honeycomb.