Page 57: of Marine Technology Magazine (October 2011)

www.seadiscovery.com Marine Technology Reporter 57DMS-500 Motion SensorThe DMS 500 range of motion sensors has been launched by Teledyne TSS to meet the needs of users who require a conservatively priced, top- quality motion sensor with Ethernet connectivity, but without the high integrity subsea housings that typify Teledyne TSS products. The newest addition to the range is the DMS-500H. It can be used to measure heave and has important applications such as in support of crane and winch control and helideck operations. The DMS-500RP was launched earlier in the year and has been developed to measure roll and pitch to meet the needs of dynamic positioning (DP) system builders or any applicationthat needs to provide high dynamic accuracy during vessel turns or extreme sea conditions. The DMS-500 label will ultimately be applied to a complete range of conservatively-priced sensors that incorporate a number of advanced and innovative features for applications such as dynamic positioning, wave height monitoring and structural stress monitoring. The versatile design means that the range will be available in various accuracies so that models are suitable for a wide range of bespoke applications. Measurement Technology NW (MTNW) implemented its running line tensiometer (RLT) technology with a Samson synthetic rope in an offshore mooring monitoring project engineered by Delmar Systems. This implementation is MTNW?s first use of tension measurement technology with 2?+ synthetic ropes. Recently, Delmar Systems was con- tracted to moor an offshore supply vessel (OSV) to a major offshore plat- form in the Gulf of Mexico. The OSV is using a three-point mooring system consisting of two stern hawserlines attached to the platform and abow mooring line attached to a preset suction pile foundation in 2,900 ft.of water. The mooring system had to be as robust as possible while still maintaining ease of handling and rig-ging by the vessel crew. To achieve a higher Maximum Breaking Load on the OSV bow mooring line while maintaining deckmaneuverability, Delmar chose Samson?s AmSteel-Blue HMPE rope made of high modulus polypropylene (HMPE) as the bow winch line. An MTNW RL-20175K running line tensiometer provided tension meas- urement for the bow line. During the design phase of the project, MTNW thoroughly tested and calibrated the RLT using the specified 2¼" AmSteel-Blue rope. ?This is MTNWs first use of an RLT to measure tension in a major synthetic mooring line of this largediameter,? said Tom Rezanka, man- aging director of MTNW. New Approaches to Offshore Mooring IMENCO?s ROV Shackle Imenco's semi-automatic ROV Shackleis inherently safe as there is no need to retrieve the shackle pin. The shack- le can be used as many times you likeas long as you clean it with fresh water after operation. The shackle'sbody and most part is made from high tensile stainless steel S165M equiva-lent to Martensitic Stainless steel 17/4PH The pin is standard shackle pin. The Imenco Shackle comes invarious sizes 6.5T ? 12T ? 17T ? 25T- 25T- 35T ? 55T ? 85T ? 150Tons. Safety factor is 5. For the biggershackles clients often request a trans- portation basket which also can be certified. For more detail information please contact:Email: al.cohen@ imenco.comwww.imenco.com MTR#8 (50-64):MTR Layouts 10/11/2011 9:13 AM Page 57