The element describes the means of transport of the diver by an <exposuretoaltitude>. Allowed keywords are: commercial-aircraft, unpressurized-aircraft, medevac-aircraft, ground-transportation, or helicopter.
If <exposuretoaltitude> is given, <transportation> must be set, too.
<altitudeofexposure>, <dateofflight>, <surfaceintervalbeforealtitudeexposure>, <totallengthofexposure>, <wayaltitude>
(see also <exposuretoaltitude>, and <dive>
<!-- transport via a "normal" commercial airplane -->
<transportation>commercial-aircraft</transportation>