Rear boom

Stern boom at the stern of the Far Samson

The Limiting Factor submersible on the stern boom of the mothership Pressure Drop

Research vessel R / V Atlantis with submarine Alvin

As a stern gallows mobile lifting systems are referred to ships. In English, rear booms are called A-Frame because of their appearance. They are used to pick up and release objects and to support underwater work.

The stern boom consists of two movable supports attached to the edge of the ship's deck , which are connected at the upper end by a cross brace. In the middle of the strut is its own winch or pulley, which is connected to other winches installed on board. This construction can be pivoted outboard or inboard using hydraulic cylinders. In this way, objects can be picked up or exposed or underwater work can be supported.

Rear booms for heavy loads are usually attached to the stern . But there are also smaller lifting systems of the type, e.g. B. for exposing and picking up underwater robots , which can also be installed on the side. The rear boom can also be installed or removed depending on the intended mission.

Individual evidence

1. ^ ^{A b} National Oilwell Varco: A-frames. Retrieved February 13, 2014 . 
2. ↑ TTS group: A frames. Retrieved February 13, 2014 . 
3. ↑ IFM-GEOMAR: New German Deep-Sea Research Vessel. (No longer available online.) Archived from the original on February 22, 2014 ; accessed on February 13, 2014 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.  
4. ^ Sea OOC: Magnum ROV. Retrieved February 13, 2014 . 
5. ^ Solstad Offshore ASA: Normand Master. (No longer available online.) Archived from the original on June 19, 2012 ; accessed on February 13, 2014 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.