Reply
 
Thread Tools Search this Thread
 
Old 18 October 2010, 17:48   #21
Member
 
lakelandterrier's Avatar
 
Country: UK - England
Town: Gloucester
Boat name: Lunasea
Make: Ribcraft
Length: 5m +
Engine: Suzi 140
MMSI: 232005050
Join Date: Sep 2007
Posts: 1,126
Quote:
Originally Posted by Doug Stormforce View Post
On the basis a MOB is in distress (i.e. his life is in danger) then its a Mayday.

Current teaching is Mayday NOT Pan Pan.
I'm not convinced that's always the case. As one who grew up racing singled handed dighies I would often capsize & end up on the oggin - you righted the boat, clambered back in & & carried on with the race- as I'm sure still happens today. I therefore don't understand why a MOB is deemed automatically to be a mayday event.

My understanding is a mayday is "grave & immient danger" not just danger. It must surely depend on the situation - individual, speed at which the MOB happened, time in water, clothing , sea conditions,water temperature, dsitance from safe haven etc.. . a MOB CAN be a mayday, I'm not convinced it's an AUTOMATIC mayday. I'm willing to be pursuaded though.
__________________

__________________
lakelandterrier is offline   Reply With Quote
Old 18 October 2010, 17:56   #22
RIBnet supporter
 
Pikey Dave's Avatar
 
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 7,595
RIBase
it's all a bit academic shirley. PanPan or Mayday, you'll get the same attention from the cavalry. You ain't going to get your legs slapped for calling either
__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: See rule#5
Pikey Dave is offline   Reply With Quote
Old 18 October 2010, 18:12   #23
Member
 
m chappelow's Avatar
 
Country: UK - England
Town: yorkshire
Boat name: little vicky
Make: avon ex RNLI
Length: 3m +
Engine: tohatsu
Join Date: Mar 2008
Posts: 2,310
Quote:
Originally Posted by lakelandterrier View Post
I'm not convinced that's always the case. As one who grew up racing singled handed dighies I would often capsize & end up on the oggin - you righted the boat, clambered back in & & carried on with the race- as I'm sure still happens today. I therefore don't understand why a MOB is deemed automatically to be a mayday event.

My understanding is a mayday is "grave & immient danger" not just danger. It must surely depend on the situation - individual, speed at which the MOB happened, time in water, clothing , sea conditions,water temperature, dsitance from safe haven etc.. . a MOB CAN be a mayday, I'm not convinced it's an AUTOMATIC mayday. I'm willing to be pursuaded though.
I think the mayday for a m.o.b. is aimed at perhaps the yachties or hard boater or fishing boat with someone not dressed or expecting going into the water ,who could then be in shock injured or perhaps having difficulty in recovering them back aboard with a boat with high freeboard and then with the onset of hyperthermia and secondry drowning .
I have known people go over the side climb back on board and apart from a bit of F,,ing and blinding and a change into a pair of overalls being non the worse for the ordeal ,then there have been others ,me included that went over the side and were totally out of it .
__________________
m chappelow is offline   Reply With Quote
Old 18 October 2010, 18:15   #24
Member
 
Country: Other
Town: Stanley, Falkland Is
Boat name: Seawolf
Make: Osprey Vipermax 5.8
Length: 5m +
Engine: Etec 150
Join Date: Mar 2006
Posts: 3,688
If you are worried about the prop turning then surely the answer is to stop the engine in gear? In any case a clout round the head from a lump of metal, regardless of whether it's the prop windmilling (watermilling...?) or the skeg, is probably going to draw blood with a ton of rib behind it.

I've never done a real MOB so can't say too much but having given some thought to how I would handle it if I did (because there is not much help around and by the time it arrived the person in the water would be in a bad way with the cold), I decided I'd leave the engine on until I at least had a line to the person in the water as the often gusty winds here will take a light boat like a rib in an unexpected direction very quickly. If you shut the engine off when they were 10 yards away you might well miss them completely... I've done a fair bit of practice with buoys and in windy conditions, getting close enough to grab somebody without overcooking it and running them over is definitely not as easy as you think before you try it.

Keeping the fan and the person at opposite ends as far as possible would seem to be the sensible thing to do?
__________________
A Boat is a hole in the water, surrounded by fibreglass, into which you throw money...

Sent from my Computer, using a keyboard and mouse
BogMonster is offline   Reply With Quote
Old 18 October 2010, 18:36   #25
Member
 
geir's Avatar
 
Country: Norway
Town: Haugesund
Boat name: Katrina
Make: Hurricane
Length: 6m +
Engine: 100 Hp Merc.
Join Date: Sep 2010
Posts: 73
Nozzle?

Anybody tried to use a nozzle/shield around the propeller for diving operations? Will it increase drag/improve handling or have any other side-effects?
__________________
reparere, kalibrere, konfigurere, destruere, protestere..."
- Pompel...eller Pilt ... eller http://geirmeister.net/gorgon.mp3
Gorgon vaktmester ... eller Geir
geir is offline   Reply With Quote
Old 18 October 2010, 18:54   #26
Member
 
Country: Other
Town: Stanley, Falkland Is
Boat name: Seawolf
Make: Osprey Vipermax 5.8
Length: 5m +
Engine: Etec 150
Join Date: Mar 2006
Posts: 3,688
Quote:
Originally Posted by geir View Post
Anybody tried to use a nozzle/shield around the propeller for diving operations? Will it increase drag/improve handling or have any other side-effects?
Prop guards do exist but everything I have ever read about them says they increase drag and reduce performance. No doubt good in the right situation, but not something I want to fit just to stop rotavating penguins
__________________
A Boat is a hole in the water, surrounded by fibreglass, into which you throw money...

Sent from my Computer, using a keyboard and mouse
BogMonster is offline   Reply With Quote
Old 18 October 2010, 19:11   #27
RIBnet admin team
 
Poly's Avatar
 
Country: UK - Scotland
Boat name: imposter
Make: FunYak
Length: 3m +
Engine: 2 stroke YAM 20 HP
MMSI: 235089819
Join Date: Sep 2005
Posts: 10,114
Quote:
Originally Posted by lakelandterrier View Post
I'm not convinced that's always the case. As one who grew up racing singled handed dighies I would often capsize & end up on the oggin - you righted the boat, clambered back in & & carried on with the race- as I'm sure still happens today. I therefore don't understand why a MOB is deemed automatically to be a mayday event.

My understanding is a mayday is "grave & immient danger" not just danger. It must surely depend on the situation - individual, speed at which the MOB happened, time in water, clothing , sea conditions,water temperature, dsitance from safe haven etc.. . a MOB CAN be a mayday, I'm not convinced it's an AUTOMATIC mayday. I'm willing to be pursuaded though.
You are right - it depends on the circumstances, and obviously dinghy sailors who plan to spend some time in the water and are usually in company (often of a safety boat) is quite different from mid channel at night in a F6 when you had just taken your lifejacket off to put extra clothes on!

However as I understand it the reason we are encouraged to regard "all" MOBs as Maydays are:

(1) People overestimate their confidence in getting to the casualty quickly. In general "we" always practice MOB when we are expecting it and in generally good conditions - the dummy/buoy is usually quite visible (so training centres get them back).
(2) People forget to make the call until things have escalated to a proper emergency resulting in lost time in mobilising resources.
(3) There may be some reluctance at making the call at first - the emergecy services are clear they want the call early (and stood down if not required) - the idea is that it avoids the uncertainty of "is this a grave and imminent danger" or just an "urgency" situation - or am I going to get a bollocking for wasting their time.

So it is a MAYDAY unless there is a good reason its not.

Common sense would suggest that if you fall off when untying your boat from its mooring in relative shelter, are wearing a life jacket and there are lots of people about that this is probably not immediately a mayday (although people do die falling in at moorings). Even in great weather I can't imagine a situation when I am on the plane and someone falls overboard and its not going to justify a mayday.
__________________
Poly is offline   Reply With Quote
Old 19 October 2010, 04:27   #28
Member
 
Country: Denmark
Town: copenhagen
Make: Avon SR 4.7
Length: 4m +
Engine: E-tec 90hp
Join Date: Aug 2009
Posts: 77
Quote:
Originally Posted by geir View Post
Anybody tried to use a nozzle/shield around the propeller for diving operations? Will it increase drag/improve handling or have any other side-effects?
We (diving club) used to have a Avon 4,2 rib with a 40 HP evinrude. Some years ago a prop-shield was mounted on it. It changed the performance of the rig quite much. Top speed, hole-shot and general handling became quite bad. The direction stability was huge which means it was really tough to handsteer. I would never mount such a thing on my own Rib.
__________________
njensen is offline   Reply With Quote
Old 19 October 2010, 04:33   #29
Member
 
Razorbill RIBs's Avatar
 
Country: UK - Wales
Town: N. Pembrokeshire
Boat name: Various
Make: RIBs & Hovercraft
Length: 9m +
Engine: Outboards
MMSI: Various
Join Date: May 2009
Posts: 1,357
RIBase
Quote:
Originally Posted by Pikey Dave View Post
it's all a bit academic shirley
"Shirley you can't be serious?"......"I am serious, and stop calling me Shirley"
__________________
Dan Worth
www.razorbillribs.co.uk

Follow us on Facebook http://www.facebook.com/#!/group.php...17306504953480
Razorbill RIBs is offline   Reply With Quote
Old 19 October 2010, 04:47   #30
RIBnet supporter
 
Pikey Dave's Avatar
 
Country: UK - England
Town: South Yorks
Boat name: Black Pig
Make: Ribcraft
Length: 5m +
Engine: DF140a
MMSI: 235111389
Join Date: Feb 2008
Posts: 7,595
RIBase
Quote:
Originally Posted by Dan Worth View Post
"Shirley you can't be serious?"......"I am serious, and stop calling me Shirley"
I wondered how long it would take
About 6 posts by my reckoning
__________________
Rule#2: Never argue with an idiot. He'll drag you down to his level & then beat you with experience.
Rule#3: Tha' can't educate pork.
Rule#4: See rule#5
Pikey Dave is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -5. The time now is 18:41.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.