Handling system
The mechanical setup to maneuver the diving bell and the clump weight.
Bell Handling Console
The new Bell Handling Console is the control panel for the iLars, the completely renewed Drass Bell Handling System; the Bell Handling Console is built in stainless steel and includes a Siemens 15” touch screen HMI IP65 as the interface with the fail-safe PLCs and remote I/Os network; a second 15” screen is included for CCTV monitoring. Commands are given by means of the redundant, SIL certified joystick. The Bell Handling Console is connected to the LARS Control Panel which is the center of automation related to the handling system.

The Bell Winch
The Bell Winch operates the lowering and lifting of the Diving Bell up to the maximum depth. It is outfitted with a wire rope of 400 meters length and 36mm diameter (non rotating type). It is a single drum winch, hydraulic driven by means of two (2) hydraulic motors

passive heave compensator
The passive heave compensator is a device installed to maintain the diving bell at its diving depth, within certain limits, regardless of the vertical movement of the support vessel due to wave action. The heave compensator is automatically maintained in a central position with a simple pneumatic arrangement
Trolley system
The Trolley System allows to move the bell from the clamped position close to the Hyperbaric Chamber to the moon pool and vice versa.
The trolley is equipped with a couple of pliers to release the bell for launching and catch the bell pins during recovery operation. The main features are:
Secure trolling thanks a couple of hydraulic cylinders. The cylinders are able to fix the trolley in position, avoiding any movement of the bell due to vessel acceleration.
Horizontal movement of the trolley from moonpool to mating position and viceversa.
Vertical movement is also available in order to align the diving bell man hole to the bell mate trunk
Four legs are foreseen on the edges of the trolley in order to guide the bell smoothly the cursor inside the moonpool rails

Umbelical winch
The umbilical winch allow the deployment of the umbilical cable for the supply of services necessary for the bell and divers in water.
The Umbilical winch is fitted with a tensioning device that maintains a positive “pull” on the umbilical to prevent excess umbilical being paid out. Also these equipment are hydraulically powered by two Open Circuit Hydraulic Power Packs.
The Umbilical Winch comprises a standard single drum driven by a single chain and sprocket arrangement. The sprocket is driven via one pinion connected to single motor with disk brake.
The bell umbilical winch deploys and recovers the bell umbilical in passive synchronization (constant tension) with the bell lift winches. The umbilical is spooled on the winch via a diamond cut lead screw, driven by the drum shaft on a chain and sprocket arrangement.
The design of the umbilical winch shall allow for the incorporation of the umbilical, an umbilical slip ring and rotary union assembly.

Bell cursor
The Diving Bell cursor drives the Bell through the moon pool. Each Cursor consist of a tubular frame which latches to, and encloses the upper part of the bell external frame and guides the same rollers along the vertical guides of the moon-pool.
Drass Clump Weight
The Drass Clump Weight, an essential part of the handling system for the diving bell, safely leads the bell to working depth, stabilizing its descent / ascent, thereby ensuring the safety of the divers. It ensures alignment of the diving bell and the bell cursor during entry/exit of the moon pool and can allow emergency recovery of the diving bell.
