do you think this interference come from ships?we have already made frequency scan and show that all the band are affected by this interference(1.5G to 2G) CDMA Band 1.9G!!! and what more in the same site only the sector are oriented to the sea are affected and others are normal!! and in some others sites two sectors are oriented to the sea one affected and the other one are not affected
and for the registration it’s the same as frequency update in GSM
best regards