(b) The Vessel, unless the written consent of the Owners be first obtained, shall not continue to or go through any port, place, area or zone (whether of land or sea), or any waterway or canal, where it reasonably appears that the Vessel, her cargo, crew or other persons on board the Vessel, in the reasonable judgement of the Owners, may be, or are likely to be, exposed to War Risks. Should the Vessel be within any such place as aforesaid, which only becomes danger ous, or is likely to be or to become dangeraus, after her entry into il, the Owners shall have the right to require the Vessel to leave such area.