A-Frame Marine Deck Crane with outer hydraulic cylinder to change the frame angles, to load with different working height. it has the luffing, hoisting functions, for the lifeboat or cargo handling on the tail of deck of marine. GBM Series A-frame cranes are designed against the application and requirement from clients, fabricated with rolled-steel to connect with the reserved basement or directly welded on deck. GBM is doing customizing, with or without cabin, or remoted controlling unit will be optional. GBM Series telescopic boom cranes with Octagonal boom frame, better symmetrical cernter design, to take place the Pentagon or hexagon frames in order to meet the high cost-performance, better stability and bent-resistance, and higher loading capacity. Telescopic boom marine crane from GBM with multifunction, durable, and flexible, and meet the tough sea environment.