That sail boat (41m Fitzroy S/Y Inmocean) had a draft problem not air draft problem, the tide was very low and it ran aground http://www.yachtforums.com/forums/general-sailing-discussion/7294-fitzroy-yacht-s-y-inmocean.html#post149648 It took around an hour to clear her. Cheers,
I might had mistaken that particular story for an air draft issue, when it was the other draft issue to be known. However plenty of vessels have hit the underneath of that 17st bridge. I am sure you can still see plenty of battle scares telling all kinds of stories of hurt underneath that bridge.
I was not arguing your point at all, just adding the information you might have missed, and one needs just to do small search on you tube for "boat bridge" and see the results. This thing is very common and should be taken into consideration and given the right thought and arrangement. Cheers,
Beau How do truckers know or learn there height for bridge clearances? Not just for the cab, but I am thinking every load could be different, with different trailers or cargo trailing along to be delivered. Some of them are even pulling yachts.
What happened to approaching a bridge very slowly and have someone in the right location to verify clearance? If I m within a couple of feet based on my known air draft and the published info (or the tide boards) you can bet I m approaching bumping in and out of gear ready to back out. If I m alone on the boat and don't have someone to go on deck, I don't take chance. Inge yet to encounter a bridge tender who refuses an opening when I tell him that it s too close and I don't have anyone on board to check actual clearance
Air Draft on a cruise ship can change by several feet depending on the weight of the vessel at the time. How much fuel, water, passangers, crew, etc.........
Not to mention salinity can have an effect on air draft as well. Which is why when I measure the air draft with a tape measure I also make a reference note of the measured distance from the bulwark to the surface level of the fluid I am floating in.
On most yachts load and salinity will not have a huge impact and you are better off taking the worst case scenario Larger vessels have plimsol line so air draft can be corrected. On smaller boats like what most of us here own or run, you should be able to see how the boat sits by looking at the water line and where it is compared to bottom paint But again there is no excuse for a captain to just plow under a bridge if there is any doubt This is not rocket science!
Yes, every now and then these guys do have something fairly intellectually stimulating to share They have taught me a lot
Who says that the height of the bridge published was correct, this is China afterall. In this photo we were supposedly having 5 meter clearance...
Most yachts would do as you described, which is what I do as well, if there is any doubt use a spotter and approach with caution and control.
but somehow i think Latina431 will not be very stimulating... it's "its" post nr 1 and sounds like an automated post to me.
bridges C4ENG, When was the last time you went under the 17th Street bridge, Firstly it is an opening bridge, refered to as either a draw bridge or a bascule bridge. 55 foot clearance when the spans are down. There is no evidence "of plenty of yachts" hitting the new bridge and leaving scars, maybe you are thinking of the old bridge which most certainly had plenty of not just scars but heavy hits on each side and on the underside. The bridge opens on the hour & 1/2 hour or on demand for commercial traffic. Besides being a dull concrete color the bridge is one big mess (IMO) and I find it puzzling why the city do not do as they did with the old bridge and have it painted or at least clean this one up. A poor design seems to allow everything to drain off the road way onto the concrete.
YachtJockey I will look again under that 17 bridge to see if I do see evidence. I am sure there are paint marks from sail boat mask and yacht antenna's scrapping. Battle scares might had been an overstatement. I was thinking more about Simpson Bay bridge SXM, that bridge has serious battle scares all over and under her. What happen to Latina? I was just getting to know her. You mean she wasn't what I thought? I wonder how often that happens?
Bridges Next Tuesday June 1/12 I will be going up the Welland Canal with a Volvo Ocean 70' Puma Racing sail boat and she has a 105' mast. We will be going under the Garden City Skyway which has a 110' air draft. Name of sailboat is Il Mostro (Italian for Monster) She will be in the Mackinac race this year. I will be onboard the owners 85' Pacific Mariner and will get pictures going under the bridge. Rodger