A delegate of six persons, led by the Master of the Honourable Company of Air Pilots, Captain Peter Benn, visited the Observatory on 22 September 2016. The Observatory has a long history of collaboration with the Honurable Company, including the joint publications of information on windshear and low level wind effect. The visit reviewed the collaboration between the two organizations over the years and looked forward into future opportunities of further collaboration. The delegates were also introduced to the latest developments of aviation weather service in the world and in Hong Kong in particular. The visit of the Master is arranged annually and serves to strengthen the co-operation between the two organizations.