the overall economy of cargo vessels. When working with slewing cranes, a large portion of the total crane cycle time is accounted for by spotting of the cargo. In container handling, for example, spotting may take as much as 40 percent of the cycle time. The Swedish crane manufacturer Hagglunds Marine & Offshore AB has utilized a microcomputer to achieve appreciable reductions in spotting time.
The first of Hagglunds new cargo spotting aids, named Steadyline, was introduced in late 1985. It was followed during 1986 by a complementary system, known as Swing Defeater.
These tools constitute a major advance in cargo handling technology.
High-performance, high precision cranes are the basic requirement for fast, effective cargo handling. However, the attainment of maximum output is dependent on the skill of the crane operator. Even for the skilled operator it is difficult to compensate for the torque introduced into the crane during slewing and the unpredictable movements of the load caused by wind, heel or collisions with other cargo or the ship structures.
With Steadyline, the microcomputer has been harnessed to solve these difficult dynamic control problems. The microcomputer, located in the crane housing, is linked with sensors and electronic transducers in the electrohydraulic power swivel at the hook or spreader. When picking up a cargo unit, the operator sets his control lever to the required final alignment relative to the ship. Steadyline speedily adjusts the unit to the alignment and maintains it regardless of crane movements and external disturbances.
Unless the cargo is perfectly plumb when the load is lifted, swinging is inevitably introduced.
This pendulum effect is a leading time-wasting factor in cargo spotting. With Swing Defeater a microcomputer is used to analyze signals from a number of sensors which indicate the origin of the pendulum effects. By modifying the orders given by the crane driver, Swing Defeater counters pendulum effects before they arise.
Steadyline and Swing Defeater greatly improve the speed and safety of cargo handling, as well as reducing the risk of damage to the cargo, the gear and the ship.
As one of the premier builders of marine and offshore cranes, Hagglunds offers a wide range of products, from the smaller L type cranes, suitable for fast cargo handling, to the larger G type units for bulk and unit care goes.
In fact, since their introduction in 1974, more than 1,000 G type cranes have been ordered or delivered. The rugged G type, with capacities up to 50 tons in single mode, is a general purpose crane which can operate in some of the most severe environmental conditions.
For example, G type cranes have been fitted aboard several U.S. Coast Guard Polar icebreakers.
A number of G cranes have also been fitted on Arctic bulkers and will be installed aboard Soviet nuclear icebreakers currently under construction.
For free copies of a full-color descriptive brochure from Hagglunds on Steadyline, Circle 50 on Reader Service Card For free copies of the full-color brochure on the complementary system, Swing Defeater, Circle 51 on Reader Service Card For a free 12-page, full-color descriptive brochure on cargo cranes from Hagglunds, Circle 52 on Reader Service Card
Rivertronics, Inc. of Alton, 111., manufacturer and distributor of the RT-500 Swingmaster swingmeter system recently introduced an upgraded model, the RT-500 AC which is offered at the same price. Norman Matsche, president and chief operating officer, states "Our customers are towboat operators work
variable pressure hydraulic system for optimum operator control and crane safety. Boom hoist, main hoist, and fast line hoist and swing have separate hydrostatic circuits so three functions (swing, boom hoist and main line on whip line hoist) can be operated simultaneously with
—Literature Available Full flow, X-inch ball valves with swing-out bodies for fast, easy maintenance are now available from Whitey Co., Highland Heights, Ohio. The valve, designated the "62" Series, features high flow capacity and is rated to 2,200 psi (ANSI 1500-lb Class) and 450°F. This quarter-tur
, and 57 inches deep. Using waste heat from a diesel engine or other source, the unit evaporates salt water in a vacuum to produce fresh water. A swing-away hatch provides easy access to the plate bundles and distiller chamber for ease of maintenance. Standard titanium plates, used in both the
that make these cranes ideal for offshore operations. Included are details on Skagit's high-performance hydraulic system and tne extra smooth swing system. Information on the big performance lattice boom with its maximum 120-foot reach is given and accompanied by a work range diagram. Also
capsules each with two boarding levels, stowed vertically on each side, Rescube allows evacuation from each of six deck levels. Fully boarded, Rescube swings out to launch position and is ready for free fall evacuation into the sea. The system fulfills another function in that the three capsules provide
, in describing the principal advantage of the Waco hoist over competition, stated that while conventional pilot hoists leave the rigid ladder section swinging freely against the ship's side, the Waco hoist, due to its patented magnetic undercarriage, prevents this condition. Additionally, the Waco hoist can
, the ship is outfitted with a "Who's Who" list of the latest technology, including a pair of ABB Azipod thrusters; four thrusters, including a pair of swing-up thrusters and a pair of Kamewa tunnel thrusters: a combined package which is designed to provide unprecedented station keeping. In addition,
35 tons. The hydraulic-operated MCF 2550 has a 25-ton lift capacity at 10-foot radius; pedestal diameter is 41 inches. The 50-foot boom has continuous swing rotation in either direction up to two revolutions per minute. Hinge pins, cylinder rods, and fasteners are stainless steel. The hydraulic winch
move the vessel at a service speed of 15 miles per hour. A self-unloading vessel, the Columbia Star is equipped with a 265-foot conveyor boom which swings over the vessel's side to discharge up to 10,000 tons of bulk cargo per hour. The main propulsion unit was supplied by the Electro-Motive Division
a DMI HydraMaster HDM80-32x27; it has a suction diameter of 31 inches, discharge diameter of 27 inches, and impeller diameter of 80 inches. The 2-drum swing winch is rated 65,000 pounds and the ladder winch has a rating of 49,450 pounds. Others who attended the christening ceremony and reception that
same period in 2018.” They identify At present, oil prices will not support upward turn in the prices for oil and gas. edented shift, with the pendulum swing- Guyana as an important offshore region. large scale investment in new ? elds. In mid-September, the unprecedented at- ing from the long-standing
suspended sediments. Particulate pipeline. They dredge employing a Clamshell dredges are designed to matter in the water that contributes to sideways swinging motion using an- handle loose to medium dense soils and turbidity includes inorganic solids (e.g. chors and winches and move forward dredge materials
of Mexico to the 1.2 million TEUs inbound to the U.S. professor Jean-Paul Rodrigue) as a link Panama Canal Authority, now deriv- U.S. West Coast. to swing back to West Coast discharge, for trans-shipping containers between ing a large proportion of its toll revenues Any look at history always begs
port designer ? rm Moffaft & Nichol has made the case that in- creased fuel costs due to IMO2020 could prompt 1.2 mil- lion TEUs inbound to the U.S. to swing back to West Coast discharge, with shorter transit times from Asian ports. The inaugural LNG transit of the new and improved Pan- ama Canal came
. Associated is challenged with on dense cargoes up to an 85 cubic yard on where the vessel is anchored. Hav- making the future workforce aware of swinging cargo. Just in 2019 alone, As- bucket on lighter material. The balance ing the amount of berths Associated has sociated has experienced approximately
at its ? ve is long enough to clear tires and fenders; the worm gear shipyards located in southern Louisiana and Texas. Diver- controls the boom swing. Use the Rescue Davit with the sity of offerings has been Conrad Shipyard’s niche. Built at VR 12 Rescue Pole, sold separately, to complete the system
by a marinized V-6 engine. The monitor has four discharge ports including one that feeds a 5-inch large diameter hose (LDH). Other features include a swing-out side dive door, Georgia’s Rabun County Fire Services has placed a Lake and a Davit crane with two access points. The T-top pilot- Assault Boats
2019 BY ROBERT DAY, HEAD OF OFFSHORE, VESSELS VALUE NEWBUILD moved into full swing and we saw the THE RIG MARKET DEMOLITION Unsurprisingly, across the offshore market ? ooded with distressed ton- In the rig sector, Borr Drilling has Tidewater continues to set the stan- sectors, newbuild orders have
signi? cant planning to ensure fuel is available for their vessel or ? eet to avoid penalties. Possible shortages could lead to sig- ni? cant price swings, making budget- ing and investment scenarios complex. Industry analyst Wood Mackenzie fore- casts a 25 percent increase in price for lower sulphur
a signi? cant “SIM IS IN” most notable insights transformation, but that transformation Nrevealed by the inaugu- is, in fact, still in full swing. ral 2018 report. It turns out that there is A WHOPPING 70-80% one message that, far and away, stands What Does this Mean for Maritime? OF MARTID
driven by automotive-level R&D Let’s start with connectivity? The Internet of Things (IoT) revolution programs in the high-volume electric ve- is in full swing, but the marine industry hicle market. It has been predicted that HuibersHuibers has lagged behind terrestrial markets in energy density in lithium
next-generation system uses Ther- or standard mechanical controls for com- engines 3H50TI, 3H50TIC, 3H50TICD, tion, Hatz has striven for the greatest mo Swing Wall Insulation technology mercial and recreational applications, 4H50TI, 4H50TIC and 4H50TICD. Be- possible ease of maintenance with the to provide
t: +44 1268 711560 m: +44 7778 357722 tion, employment and logistics support in and around U.S. ports. During my f: +44 1268 711567 most recent travel swing, two events in particular stood out in this regard: Blue Tech Week in San Diego and the 2018 Maritime Risk Symposium – Energy Classi? ed Sales +1
. At interannual time scales, changes much larger than sea- The upper 500 m contained the strongest currents. In the sonal variations were found. These swings in volume trans- initial array design, six of the moorings were topped with port were attributed to large-scale climate ? uctuations. The upward
buoys work perfectly with 3 knots of current. However, when ? ow is not constant having buoys on long mooring scopes may present a problem due to their swing radius, particularly where there are narrow chan- nels and cross winds. For this reason, in the Douro River piles are being used in the shallower
winter, professionally as I get to December is undoubtedly my favorite time of the year slow down, think and re-group. I am coming off a manic travel swing which saw me on the road eight out of nine weeks, crisscrossing the country for a number of exhibitions, confer- ence, symposia and one-on-one company
listeners that clouds had cleared temporarily “We were pre-packaged variety, where the details of converting old simply able to capitalize on a temporary swing in the sup- debts into new shares agreed in advance) is that company ply demand equilibrium due to U.S. ? ag vessels leaving the balance sheets
a At interannual time scales, changes much larger than sea- much longer record for examining seasonal and interannual sonal variations were found. These swings in volume trans- changes in the Current. port were attributed to large-scale climate ? uctuations. The Of signi? cance was the response of the
At interannual time scales, changes much larger than sea- different facets of volume transport through the Channel. In sonal variations were found. These swings in volume trans- particular, this longevity is needed to see links with remote port were attributed to large-scale climate ? uctuations. The current
Hamburg, Germany for my 14th SMM exhibition, and nowhere else Michelle Howard email@example.com is it more clear that the this evolution is in full swing. When I started attending the SMM exhibition in 1992, the exhibition halls Editorial Contributors Elaine Maslin - Scotland were ? lled with heavy
reduced their rig counts, causing demand for OSV geance in the period from 2011 to 2013. Like all maritime services to plunge.” segments, the pendulum swings both ways; when oil prices After slogging through considerable OSV doom and fall, producers pull back on exploration and, where they gloom, they
BALLAST WATER MANAGEMENT SYSTEMS The BWMS Boom has arrived (really) With the USCG approval process in full swing, the much-debated, long-awaited ballast water management system market is heating up Edited By Tom Mulligan, Science & Technology Editor he road from 2004, when the International Maritime
JULY 2018 At the Helm 18 Pilides Meet the driver of Cyprus’ maritime & blue economy future. By Greg Trauthwein 24 Cleaning Up Spill tech testing is in full swing at Ohmsett. By Jane Delgado Ohmsett 30 Send in the Drones Drones for dirty, dangerous jobs. By Greg Trauthwein RIMS BV Copyright: All Rights Reserved
more than a mere sampling of crewmembers subject drug and alcohol tests per SMI than CFVs. Finally, small number of tests which could cause wide swings to Random drug tests; therefore, the trend as shown chemical testing appears to have enhanced the safety in the percentages of positive tests per