The Press Association has reported that an Italian coastguard plane is involved in the search mission for a missing F-16 jet.
Rescue boats are also involved, as well as three cargo ships, that were asked to help out with the search.
Commander Cosimo Nicastro of the Italian coastguard said: "The visibility is already poor because it is night, but there is also sleet."
Italian News Agency LaPresse has reported that the F-16 fighter jet, which went missing on Monday night, was flying with three other F-16s as part of a training mission.
The newspaper added that the pilot was able to raise the alarm signal before falling.
Search teams are currently looking for the missing jet, which they believe could have crashed in the Adriatic.
Search teams are working under the assumption that a missing F-16 fighter jet from the Aviano Air Base could have crashed in the Adriatic, the Associated Press reports.
The aircraft was performing a training mission over the sea when the pilot lost contact with the base.
Contact was lost at approximately 8pm (19:00 GMT) last night, Italian aircraft and ships were dispatched to look for the missing jet and pilot.
The Associated Press has reported that the jet was not carrying weapons, and that the search covered waters off a nine and half mile stretch of coast between Cervia and Cesenatico.
Military officials are coordinating search and rescue efforts after losing communication with an Aviano F-16 fighter jet after it left an Italian air base.
Group commander Colonel David Walker has issued a statement on the Aviano Air Base website.
– Col. David W. Walker, 31st Operations Group commander
The search for and rescue of our pilot is our top priority.
We want to assure the family and friends of the lost Airman that we are doing everything we can for this effort.
Search and rescue teams are hunting the Adriatic Sea for the F-16 fighter jet that went missing after it left the Aviano air base in northern Italy.