Gangway system (1) for an offshore service vessel (N), suitable for the transfer of personnel between said service vessel (N) and an offshore structure(S), in wave motion conditions,
- which gangway system (1) comprises:
- a tower (2), defining a longitudinal axis (2′) and designed to be erected from a deck (P) of said offshore service vessel (N),
- a carriage (3) maneuvered in translation over the height of said tower (2), along an elevation axis (E) oriented parallel to said longitudinal axis (2′),
- a gangway (5) extending from said carriage (3),
- which gangway (5) comprises:
- a waiting platform (6), which is assembled with said carriage (3) by means of rotational assembly means (8) defining a yaw rotation axis (R1) oriented parallel to said elevation axis (E), and
- a corridor (7), extending from said waiting platform (6),
- which corridor (7), telescopic, comprises:
- an upstream section (71), one upstream end (711) of which cooperates with said waiting platform (6) by means of rotation assembly means (9) defining a pitch rotation axis (R2) oriented perpendicular to said yaw rotation axis (R1), and
- a downstream section (72), movable in translation relative to said upstream section (71) along an extension axis (A) oriented perpendicular to said pitch rotation axis (R2),
- which downstream section (72) comprises a downstream end (722) which is designed to be stabilized at said offshore structure(S),
- which gangway system (1) further comprises maneuvering means for maneuvering said gangway (5):
- yaw maneuvering means (11), for the rotational maneuver of said gangway (5) around said yaw rotation axis (R1),
- pitch maneuvering means (12), for the rotational maneuver of said corridor (7) around said pitching rotation axis (R2), and
- translational maneuvering means (13), for the translational maneuvering of said downstream section (72) relative to said upstream section (71) along said extension axis (A), and
- which maneuvering means (10) cooperate with control means (15) comprising an active compensation module which is designed to control said maneuvering means (10) of said gangway (5), based on data coming from a movement acquisition module (16), so as to stabilize the downstream end (722) of said gangway (5) at, preferably resting on, said offshore structure(S).