Notice is hereby given to all mariners and other parties concerned that:

1. Reference: Notice to Mariners Number 039-2018 dated 20 February 2018

2. Addendum to Notice to Mariners No. 039-2018 for the conduct of Marine Geophysical Survey for Sangley International Airport Project in Cavite by Trinav Surveys Inc., the activity will be started on 28 February 2018 to 25 March 2018. All others no change.                  

3. In this connection, all ships/watercrafts transiting the vicinity of the abovementioned areas are advised to take note of the information and take necessary precautionary measures at all times.

4. The cooperation of all concerned in effecting widest dissemination of this information is requested.