I urgently need help! my daughter is on a yacht bound for greece. she has a schengen visa valid from 1 may 2011. she needs to get home due to emergency. the yacht will stop off in tenerife in about 4 days: who do i contact regarding her schengen visa as we need to bring the date forward? are any other visas required for tenerife? is tenerife one of the schengen members?