An additional restriction is that vessels must have less than a 190-foot air draft.

FORBES: The Port of New York and New Jersey, a Critical Hub of Global Commerce

In some instances vessels must wait for low tide to gain a few more feet of air draft so that the mast or antennas do not strike the bridge.

FORBES: The Port of New York and New Jersey, a Critical Hub of Global Commerce

In the past few years several ships have struck the bridge because its 151 foot air draft is simply too small for the larger class ships that are calling on the port.

FORBES: The Port of New York and New Jersey, a Critical Hub of Global Commerce

The senator, of course, had a distinguished military record, served as secretary of the navy under Nixon and helped to draft some important pieces of legislation, including the Clean Air Act of 1990 (he was a strong environmentalist).

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"At some point the world community needs to come together and draft some new convention or treaty, " said Paul Dempsey, director of the Institute of Air and Space Law and McGill University in Montreal.

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Meanwhile, Britain and France tabled a draft resolution at the UN Security Council that would ban all flights over Libya to prevent Tripoli's air attacks.

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