If you mean a hoisting rig, it might be a good investment. The dive platform does no good if the MOB is unconcious or injured. Also depends on what you consider a good price.
I have a Lifesling 2. It is not the inflatable type and if/ when I need it, its right on the stern rail. Because of the newer inflatables, the prices has dropped to about $125 (half of what I paid) so that's a deal. This is definitely not a waste of money when a life is involved. Larry is correct about unconscious MOB's.. problem is, the only thing you can do in that case is get close enough to haul them aboard and some sort of hoisting rig is almost mandatory as hauling up even someone who weighs even 100 lbs requires incredible strength. You should note that if you get a Lifesling or something similar, if you don't remove them when you aren't on the boat, they can 'disappear', so stow 'em when not out on the water.
If you don't sail offshore you don't really need it. BUT, offshore the problem is trying to find someone overboard. With large swells and blown out wind waves you just can't see a head bobbing in the water. A ring w/ a line and pole are a must. I would say get it bought. just my two cents and 50,000 nm experence.. Michael..
Don't depend on dive platform. No good if victim panics, injured, in heavy seas, poor swimmer, etc. Lifesling very good and USCG approved. Rig boom for hoisting victims with winch help. PRACTICE mob maneuvers and rescue procedures preferably with a live volunteer. Cannot over emphasize practice !
mob systems work great for short handing and crewed sailing. they dont work so well for solo sailors....is difficult to deploy it when yer overboard--might be better for a solo sailor to tether properly. but if you are going to any crewed sailing or shorthanding, is an excellent idea.
I don't have an MOB system as usually I sail solo. At night or during the day if things get nasty always have my harness on or in the cockpit ready to put on so I can tether myself to my boat. If I have a guest(s) aboard who are non-sailors. I normally keep closer to shore & never take them out if WX seems could be nasty. If that should happen, non-sailors are definitely difficult to deal with while still trying to handle the boat...don't need that. Plus my kittties are aboard....hmm... that would be a huge decision!!!! I have to question if a swim platform is much help in an emergency as you still need to get them to the platform first + then getting someone out of the water can be another real issue depending on their condition & if they are even able to assist you. If this is of help... if I am solo or have an experienced sailor with me & the WX should turn nasty, I throw 150 feet of line to drag behind, have put large knots in this line every 5 feet to make it easier to grab/hang onto to pull oneself back to the boat, have the swimladder rigged to get it down easily if I would find myself or crew in the water w/o banging someone or (me) on the head + have a Handi Lift System on the stern rail for putting my outboard engine on the dinghy which is supposed to lift up to 200lb (if someone is over 200 lb. then we would have another huge problem) Of course for the Handi Lift System there must be someone onboard to work the pulley system. Depending on where you are sailing & the level of sailing expertise of the people you have aboard.......you should think less about the cost than the most effective method of the system you decide on. Ultimately, the responsiblity of all aboard your boat rests on you. There is loads of information out there on the net...seems you just need to do your due diligence....think through all the advice, suggestions from others.....is not easy. Good luck with your decision.....
not a waste of money. your platform will not reach out to someone who falls off the bow or side of the boat.