Newton buoyancy basically relates to the amount of upward force or uplift provided by a lifejacket (or flotation suit / buoyancy aid) in the water.
1 Newton = approximately 1 tenth of a kilo (100 grams)
So a 50 Newton buoyancy aid will give 5 kilos of additional uplift in the water; a 150 Newton lifejacket will give 15 kilos of additional uplift; a 275 Newton lifejacket will give 37.5 kilo 27.5 kilos additional uplift.
It is strongly recommended that a 275 Newton lifejacket is worn in conjunction with a flotation suit to guarantee self-righting in the water. The inherent buoyancy in a flotation suit (or the trapped air in a dry suit) will counteract the buoyancy of a lifejacket. Consequently a 150 Newton level of lifejacket is not always guaranteed to turn you as it has less force.
The three main types of automatic inflation mechanism are:
Newton buoyancy basically relates to amount of force or uplift provided by a lifejacket (or flotation suit / buoyancy aid) in the water.
1 Newton = approximately 1 tenth of a kilo (100 grams)
So a 50 Newton buoyancy aid will give 5 kilos of additional uplift in the water; a 150 Newton lifejacket will give 15 kilos of additional uplift; a 275 Newton lifejacket will give 37.5 kilo 27.5 kilos additional uplift
A floatation suit works by providing inherent buoyancy foam in its lining which floats a wearer in the water.
It also works on the wet-suit principle by allowing a limited amount of water to enter the suit and then by tightening the anti-flushing straps on the arms and legs. The same body of water heats up to the body temperature of the wearer and maintains the core body heat.
Indefinitely – due to the fact that it incorporates stable closed cell buoyancy foam that does not absorb water.
You can reduce any such heat stress by unfastening the centre front zip to a degree (as long as it is not raining otherwise you will get wet)
MULLION also have available breathable floatation suit which reduces heat stress by means of air vents / mesh gussets / extra underarm zips / breathable foam lining. This is the MULLION X5000 Suit = 1MG9
NO, it does not dramatically affect the thermal floatation properties as long as the tears / holes / cuts are not too big or too numerous. For example less that 15 cm tears. It is however recommended that these should be patched / repaired as soon as possible to keep the suit working to its optimum level and also to retain the waterproofness for working comfort.
Ideally yes, as then the service centre can ensure the inflatable bladder / lifejacket can be refilled correctly after service.
A floatation garment or buoyancy aid should only be worn on their own, when working close to land and by competent swimmers or where help is close to hand.
An automatic inflation lifejacket should always be worn, ideally together with a floatation garment, when working away from the shore, when the wearer is not a competent swimmer, or when there is no help close to hand.
No! A flotation suit will not self-right you in the water if you are facedown. It requires “active self-righting- ie” the wearer to turn themselves. If ‘passive self-righting” is required then the only way this can be achieved is by wearing an automatic inflatable lifejacket in addition.