95 Technical developments have enabled a boom in ship sizes in recent decades extreme winter weather, keeping to their demanding overnight schedules. There are ferries which offer more than 5,000 lane metres of parking for freight and cars on their vehicle decks. In a news broadcast showing footage of a large ferry sailing in a recent violent storm, the commentator suggested it was “battling the huge seas”, but the ship was moving remarkably smoothly – a testament to its size and effective stabilisation systems. How was it possible for the industry to scale up ferries in such a spectacular fashion, albeit in a gradual and calibrated manner, over the past half century? How can such huge hulls be manoeuvred in confined spaces, with confidence and precision, and without the assistance of tugs, even in quite extreme weather conditions? As with ships in every other maritime sector, the economics of scale have driven the industry’s desire to build bigger vessels with more capacity that operate more economically and offer better facilities so brands can sell more to their passengers. But size is not everything and ferries must still be able to get in and out of ports and berths in any tides and in difficult weather conditions. A range of technical developments in ship outfitting and equipment have facilitated this spectacular increase in ship size and productivity over the years. Access equipment made it possible to drive through the ship and significantly speed up port operations, while stern access ramps and doubledecked linkspan have done the same. In the ship-handling department, major breakthroughs have come with bow thrusters, of increasing power, that have been a boon when berthing. The advent of variable pitch propellers made it possible to precisely control power, while improved bridge controls mean the ferries can be handled from various positions. Sensors, in the shape of closed-circuit TV make the master’s job easier when performing delicate berthing manoeuvres. There are also now ferries operating with azimuthing propellers, which have replaced rudders and the need for lateral thrusters, enabling the ship handler to dynamically position the ship with great precision. Meanwhile, the bridge team’s manoeuvring skills can be safely honed using sophisticated and realistic simulators reflecting their ship, allowing them to develop both experience and spatial awareness. Notwithstanding all this technical help, those who are privileged to observe a master ship handler at work on today’s big ferries will surely be impressed. Photo: istock/ Denys Yelmanov
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