Erez Beatus – Free diving coach and former world record holder explaining the risk of Samba & (Shallow Water) Blackout while free diving. Thanks to NSUC & USFA
Samba is a loss of motor control. It is a partial loss of physical or mental integrity and generally occurs up to 15 seconds after reaching the surface, normally during your first breath after a dive. It happens due to not having enough oxygen in your brain.
A Blackout in freediving is often called Shallow Water Blackout (SWB) as it most often occurs while ascending the last few metres of water. It happens due to lack of oxygen due to rapid changes in pressure.
Very briefly, it is thought that Hyperventilation is the leading cause of blackout as it lowers the amount of CO2 in your body which lessens the urge to breathe. The Shallow Water Blackout Wiki explains this all in much more detail: http://en.wikipedia.org/wiki/Shallow_water_blackout
This week another boat incident was mentioned in a post on SpearOZ.org called Divers Beware!!!. The incident was at Malabar and luckily the boat only managed to catch the float line and rip the gun out of the divers hand. See more from the link above.
This rekindled the discussion on changing the Dive Flag we spear fishermen currently use on our floats. We are generally in agreement that the international diver down flag (red with white diagonal line) is better due to its increased visibility on the water. Efforts are being made by various people to make this change for our safety.
Special note: The blue and white Alpha flag is required to be flown on a boat when you have a diver in the water. This is required by the International Rules for Prevention of Collisions at Sea (IRPCS) Rule 27 (e).
For your own safety, always dive with a float and flag. Probably the most dangerous part of our sport is boat traffic so making an effort to be seen is in everyone’s best interest.
Continue reading SpearOZ – Divers Beware!!!
There has been a mention in the Clareville Alliman thread about popular Mosman Whaler spearo Steve Wayne being hit by a vessel so I thought I would put out a brief run down, basically to further enforce to you all out there just how careful you must be in the water. People ask me about shark shields all the time, my reply these days is, “forget the shark shield spend the money on as big as float and flag as is practical, you have far more chance of being struck by a vessel as you do being hit by a shark. Especially along the East Coasts temperate waters.
Continue reading Boating Accident concerning spearo Steve Wayne 3rd April 2011
Since we are at the start of Rock Lobster season here this might come in handy.
I found this PDF from Museum Victoria that explains the difference between Australian decapod Crustacea (lobster, rock (spiny) lobster, crayfish, bugs and scampi).
The difference between Crayfish and Lobsters