This is the bonus cache for the "Harborwalk Espionage" adventure lab. The geocache is not at the posted coordinates. To locate this cache, you must first complete the adventure lab.
In the adventure lab, you will retrieve secret encrypted messages at five different dead drop locations. After you have retrieved and decrypted the messages, you will have the information you need to rendezvous with the asset and complete your mission.
To learn the asset’s location, enter the password into Certitude. When you arrive at the location and identify the asset, use the information provided in Certitude to complete your mission.
Good luck! And remember, if your mission is compromised, destroy all evidence and proceed to the nearest safe house.

You can validate your puzzle solution with certitude.