Safe Tactics is a Dutch company that provides, equipment, TTPs and training for vertical access such as ship boarding. The firm is made up entirely of former operators and is international in scope.
They work closely with manufacturers to develop products specifically for this application.
For example, this line launcher utilizes compressed air offering up to 5 shots. Maximum range is 40m in the vertical with the grapnel. In addition to several models of grapnel, they also offer a thin, messenger line.