Egypt has told the US and European countries that the maritime blockade should not be lifted because it would be too difficult to inspect ships entering Gaza port to ensure they do not carry weaponry. Egypt regards Hamas as a dangerous neighbour and fears the Islamic group’s contacts with the outlawed Muslim Brotherhood inside Egypt. It has attempted without success over the years to persuade Hamas to merge with the moderate Palestinian Authority.
http://www.theaustralian.com.au/news/world/mahmoud-abbas-and-egypt-want-israels-gaza-blockade-to-stay/story-e6frg6so-1225879176545
Egypt would not be happy to allow the Iranian vessel sail through the Suez Canal.
Do they plan to use Port of El Arish http://www.worldportsource.com/ports/map.2588.php