Dody
Contributor
[QUOTE="Maxwelll, post:
But it does open up a larger conversation about how OW courses should be taught - should students even be passed without having a fundamental grasp of buoyancy? You'd think not. Yes it takes time and practice to get it down just right, but you'd think they could equip you with all the necessary fundamentals during OW training.
.[/QUOTE]
Not all instructors are trained in Physics which is a pity. For example, an instructor told me that once at depth, if you have good buoyancy control, you don't touch your LPI no more. That buoyancy does not depend on depth. Well, first part is true ... and second is wrong. If you are neutrally buyoant at 15 ft, you will be negative at 100ft so you will have to adjust. Simple physics. All it took for me to get it was the formula B=Vo*Dl-Wo. Another example is that CESA really freaked me out even though my instructor kept on telling me that it was easier done than thought. Had he re explained to me the principle that the more you ascend, the more air will be in my lungs and that continue to exhale would not be an issue, I would have understood that even from 60 ft (100, 130???) , it is possible to do a smooth CESA.
Same principle applies to the cylinder. Empty at 30 meters does not mean empty at 10 meters. In fact, even empty at the surface is not really empty.
There are people who are not comfortable when they are taught things they don't understand.
But we can't ask from instructors to be physicists, shrinks in addition to their teaching and diving skills
But it does open up a larger conversation about how OW courses should be taught - should students even be passed without having a fundamental grasp of buoyancy? You'd think not. Yes it takes time and practice to get it down just right, but you'd think they could equip you with all the necessary fundamentals during OW training.
.[/QUOTE]
Not all instructors are trained in Physics which is a pity. For example, an instructor told me that once at depth, if you have good buoyancy control, you don't touch your LPI no more. That buoyancy does not depend on depth. Well, first part is true ... and second is wrong. If you are neutrally buyoant at 15 ft, you will be negative at 100ft so you will have to adjust. Simple physics. All it took for me to get it was the formula B=Vo*Dl-Wo. Another example is that CESA really freaked me out even though my instructor kept on telling me that it was easier done than thought. Had he re explained to me the principle that the more you ascend, the more air will be in my lungs and that continue to exhale would not be an issue, I would have understood that even from 60 ft (100, 130???) , it is possible to do a smooth CESA.
Same principle applies to the cylinder. Empty at 30 meters does not mean empty at 10 meters. In fact, even empty at the surface is not really empty.
There are people who are not comfortable when they are taught things they don't understand.
But we can't ask from instructors to be physicists, shrinks in addition to their teaching and diving skills