It wasn't the tech inaccuracy that got to me.... it was the low IQ.
I think if you totaled the IQ of all 4 girls it would be a stretch to say the sum would be any greater than 7.
Ok... it was no JAWS.... but then you knew that. HOWEVER... I admit a bit of guilty pleasure while watching... and that's really what matters.
I did find myself wishing the movie had been about the Mayan Artifacts rather than the sharks. Also... I got a couple of 'surprises' along the way, things I wasn't expecting - and in a horror movie that's always a good thing. - JamesJM