Must See.Amazing Flying here by Pilot.
Prism Defence (www.prismdefence.com) specialise in Ship Helicopter Integration, and provides a wide range of services within this realm.

In particular, Prism are responsible for the development of Ship Helicopter Operating Limits. This involves safely taking the helicopter to the edge of the envelope; that is, the point at which more extreme conditions would make the aircraft unsafe to fly.

The limits are based on a combination of environmental factors and ship motion. Operating helicopters onboard ships is extremely complex, due in part to the difficulty of landing a helicopter on a moving platform, but also due to numerous practical engineering issues.

This video shows a landing conducted by a Prism Defence Test Pilot and Flight Test Engineer during development of Ship Helicopter Operating Limits for the Lynx Mark 90B helicopter onboard the KNUD RASMUSSEN class Offshore Patrol Vessel.