OldNSalty
Contributor
...if only boat cpts, divemasters and instructors understood this...I don't always put the mask up there nor do I always have a snorkel with me but in those cases there is always someone around to tell me I am wrong.I think is was stated almost immediately in the early posts. The waving straight arm..... its been in place, likely since the sixties or earlier...... I know it is in my texts, and was covered in class back in 1988, and in subsequent classes. This MOF thing appeared in Stress and Rescue as a Potential indicator of someone not comfortable, and a subset of other symptoms. Nowhere (that I am aware of) is it listed as a signal to present for formal communication....
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