Before engaging in speculations about high technology, one might consider where the ship last moved cargo. Also note that the cargo loaded in Egypt was destined for Lakakia, Syria, not Lebanon. As the munitions are also used by the Syrian army, it is possible that was the ultimate intended user, though I personally am inclined to suspect it would have ended up in the hands of either Hisbollah or other terrorist organizations. This is probably an example of good intel work involving Egypt as well as Israel and not a high-tech triumph. Any cargo arriving in bond from Iran to be transshipped to Syria would be certain to attract attention.
U.S. to deliver 8 advanced F-16s to Egypt on July 30-31, U.S. embassy in Cairo says (Reuters)
from the article: Israel releases arms ship said destined for Hezbollah