Alright, im new to this site, Im not a usual swimmer but i recently got in the pool and feel in love. I quickly made friends at the local pool on-base. Im a United States Marine with hopes and dreams in Becoming a Reconnaissaince Marine. In other words Marines with Gills. They are like the SEAL's from the Navy and Pararescue from the Air Force. The guys at the pool quickly tought me how to swim "the right way" cross-over and *** stroke as well as the Side-stroke and other technics. i go to the pool everyday. My biggest problem is dealing with the underwater 25 meter swim. To become a Recon Marine i have to accomplish the following....
1) 500 meter swim with out touching the floor in under 17min.
2) 30 min. tread
3) Deep end Rifle retreaval and then treading water for 5 sec.
4) 5 min. water float by using trousers as floating devise
5) 25 Meter underwater swim (my problem)
I have no problem with any of the others but the 25 meter kills me only because i feel like my lungs are going to explode. is there any tips of any kind out there that can prepare me for my "indoc" or evaluation to see if im sea worthy and serve as a Recon Marine. Thanks for hearing me out. :banana:
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Former Member
I did not look the pressure thing up now on the google, might later, but as I remember, the russians dominated the solid fuel technology, the landing on hard surface technology and the bringing the onboard pressure to one third one atmosphere (abou 300 milibars) to make the partial pressure okay. The americans use inert gases (nitrogen and others) plus oxygen to somewhere around 20 to 30% oxygen, which is ideal.
Here's everything you could possibly want to know about the subject
lsda.jsc.nasa.gov/.../Ch37.htm
I did not look the pressure thing up now on the google, might later, but as I remember, the russians dominated the solid fuel technology, the landing on hard surface technology and the bringing the onboard pressure to one third one atmosphere (abou 300 milibars) to make the partial pressure okay. The americans use inert gases (nitrogen and others) plus oxygen to somewhere around 20 to 30% oxygen, which is ideal.
Here's everything you could possibly want to know about the subject
lsda.jsc.nasa.gov/.../Ch37.htm
