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-   -   MOB systems (http://www.sailnet.com/forums/general-discussion-sailing-related/91853-mob-systems.html)

delite 09-07-2012 07:40 PM

MOB systems
 
I have been giving a lot of thought lately to recovering a MOB. Thankfully its not something I have had to do but clearly I should know how. In light winds it seems rather straight forward assuming the person is not injured. Drop my boarding ladder off the stern and they can climb back on. But what about in heavy seas and high winds? Things like a sling that attach to your boom seem less than useless in these circumstances and appear to present significant danger to those attempting the recovery.

What are you using in high winds and rough seas? Is it better to use a halyard than a block attached to the boom. How quickly can you deploy your system? If you were sailing with your family could they get you back on board?

Geoff54 09-07-2012 08:09 PM

Re: MOB systems
 
There is a lot of conjecture about this and everyone has his/her opinion. I think the important thing is to figure out what works for you and your boat and then practice it.

This is the best information that I have found -

http://www.boatus.com/foundation/fin...L%20REPORT.pdf

delite 09-07-2012 08:40 PM

Re: MOB systems
 
Thanks for that. Some good info. I also found this video on youtube. It appears recovery can require significant effort by the victim. It could be ugly if the person is injured or unconscious
MOB retrieval and recovery - YouTube

GeorgeB 09-07-2012 08:46 PM

Re: MOB systems
 
Everybody and boat is different and what may be appropriate for one might not work for the other. I was part of a MOB recovery a few years back on SF Bay. Cold water really saps a swimmer’s energy and we figure that in the first 15 minutes the MOB is an active participant in the rescue and after that, they won’t be able to aide much in their rescue. My rescue was a MOB off another race boat (we were right behind and in an ideal position). We picked him up on the first pass and although he was a service member in his twenties and not long in the water, he was shocked enough not able enough to help much in his recovery. We manhandled him up over the side and into the cockpit. Over the stern is dangerous as it is heaving up and down in any type of swell. I’d hate to be caught under a stern in bad conditions.

I double hand extensively with my spouse and MOB is something I do worry about. I’m concerned about her panicking so I’ve tried to make it a simple process. We have a MOM8 so all she has to do is “pull the pin” instead of heaving a horseshoe and MOB pole. She then releases the Lifesling. During the rescue of the Pterodactyl crew, it was reported that it takes a little time for the Lifesling to trail out behind the boat so our process is to deploy before doing the “quickstop” maneuver. Again, we use the “quickstop” because of its simplicity and that my spouse just has to blow the jibsheet at the top of the tack. Once capturing the MOB in the lifesling, our plan is to use a primary winch (we have 48’s) to retrieve the MOB. I made a block and tackle in a quickly deployable bag that can easily be attached to the boom then to the MOB (we have a sugar scoop stern.) But frankly, I think that she’ll be grinding me up over the stern.

tommays 09-07-2012 09:04 PM

Re: MOB systems
 
IF and it's A big IF they get the lifesling on the next hard part is hooking them up to a halyard as we have found it to be the best for getting them back onboard

The boom deal is a PITA as your dealing with a wildly floging mainsail

The real focus should be on jacklines and harness discipline as just even keeping somebody in eyesight in rough water is a bid problem

nolatom 09-07-2012 09:17 PM

Re: MOB systems
 
I tell my sailing students that one of the best reasons to learn the bowline is to make a loop to get under "Oscar's" arms, then to a halyard that can be led to a winch.

Or to tie a halyard into a lifesling if there is one.

Also many sailing books don't teach the quick-stop, but only the figure-8. Given the time and weather, I try to teach both.

paulk 09-07-2012 10:16 PM

Re: MOB systems
 
We periodically hold MOB drills as part of a race during the summer. Each boat is issued a watermelon. The Race Committee radios for them to be put over the side sometime during the race, and you have to pick it up again (no harnesses or boathooks!) before completing the race. Each boat needs a setup that works for them. We've found the quickstop maneuver to work well. Even under spinnaker in 15 knots of breeze, we've been able to be back at the "victim" within 45 seconds. Our boat has running backstays with 4:1 tackle that we can then attach to a harness or line(s) tied under the MOB to get them aboard over the lee rail.

delite 09-07-2012 10:31 PM

Re: MOB systems
 
45 seconds is very impressive. Clearly this is a drill that we all should be practicing and hoping we never need to use. I'm leaning towards rigging something to a halyard. That seems less likely to cause anyone injury than the boom.

ccriders 09-08-2012 11:47 AM

Re: MOB systems
 
I too am concerned about boarding over the stern and opted for a side mount ladder. To my dismay, I discovered a couple of weeks ago that if there is any current at all the ladder will lift out of its brackets when the swimmer takes hold of it. We executed the quick stop after the swimmer jumped in. There was a tidal current running against us (probably a half knot) and the swimmer had to swim pretty aggressively to get to the Type IV and then when we pulled him to the ladder, one bracket released as soon as he grabbed it. We were in pretty smooth water, the wind was about 12kts and it was much more difficult that I would have expected. Keeping the ladder in the bracket is now a priority. Any suggestions?

paulk 09-08-2012 04:22 PM

Re: MOB systems
 
Quote:

Originally Posted by ccriders (Post 919819)
I too am concerned about boarding over the stern and opted for a side mount ladder. To my dismay, I discovered a couple of weeks ago that if there is any current at all the ladder will lift out of its brackets when the swimmer takes hold of it. We executed the quick stop after the swimmer jumped in. There was a tidal current running against us (probably a half knot) and the swimmer had to swim pretty aggressively to get to the Type IV and then when we pulled him to the ladder, one bracket released as soon as he grabbed it. We were in pretty smooth water, the wind was about 12kts and it was much more difficult that I would have expected. Keeping the ladder in the bracket is now a priority. Any suggestions?

We are planning to get a canvas or dacron triangle, about 10' on a side, with grommets & snapshackes on the corners. We'd attach two of the corners to our stanchion bases and drop the other end over the side the "victim" is on. Then the "victim is placed in the bunt of the triangle, and lifting tackle (attached to our running backstay) is secured to the third corner. Hoisting on the tackle holds the victim close to the boat, lifts him up, and essentially deposits him on deck, even if he's unconscious.


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