根据相关规定，船长、高级船员、值班水手、值班机工、高级值班水手、高级值班机工、电子技工均需承担负有指定保安职责的船员职责和责任
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Asthenumberofparticipantshasincreasedfrom60to98,wewonderifwecanuseLectureHall'A'as'B'willbetoosmall.