Yes indeed, "Why is this so difficult to comprehend?" And the "this" is that "Standards" do say (at least for the one agency I know somewhat well -- and it appears for all other agencies too) that the student is to "plan the dive." Gee, think of that -- a "general standard" that applies to all conditions!
Does the "standard" (at least in PADIland) specifically state, "Plan the dive concerning, surf, depth, temperature, time, current, salinity, tidal exchange and any other pertinent item" -- No. Does it state, "Plan the dive...." -- Yes. A conscientious instructor will make sure that the relevant items are included, per the general Standard of dive planning. Having general standards that apply world wide make so much more sense than having only ad hoc "standards" -- ad hoc standards are, in fact, no "standards" at all.
Does that make sense? If so, "Why is this so difficult to comprehend?"
Does the "standard" (at least in PADIland) specifically state, "Plan the dive concerning, surf, depth, temperature, time, current, salinity, tidal exchange and any other pertinent item" -- No. Does it state, "Plan the dive...." -- Yes. A conscientious instructor will make sure that the relevant items are included, per the general Standard of dive planning. Having general standards that apply world wide make so much more sense than having only ad hoc "standards" -- ad hoc standards are, in fact, no "standards" at all.
Does that make sense? If so, "Why is this so difficult to comprehend?"