1.   Among other things, the United States wants to ensure its nuclear-powered vessels can transit the region.

2.   But the United States worries about the ability of its nuclear-powered vessels to transit the region.

3.   The United States says the treaty is too restrictive and it worries about the ability of its nuclear-powered vessels to transit the region.

4.   U.S. officials have said the pact is too restrictive and worries about measures for compliance and about the ability of its nuclear-powered ships to transit the region.

5.   UNPROFOR spokesman Jan-Dirk von Merveldt said Rose had obtained written authorisation from the Croatian Serb authorities to transit their region.