The Eurocontrol Lexicon can help here as well. The Estimated In-Block Time is defined as:
The estimated time that an aircraft will arrive in-block.
This is not very helpful, but the definition for Actual In-Block Time is:
The actual date and time when the parking brakes have been engaged at the parking position.
Depends on how bad is the sea state, but the general technique for seaplanes is to land parallel to the swell, preferably on top of a wave:
When landing on a swell system with large, widely
spaced crests more than four times the length of the
floats, the best landing heading parallels the crests and
has the most favorable headwind component. In this
Transport aircraft are certificated to a maximum operating temperature for departure that is related to International Standard Atmosphere (ISA), typically 35 deg C above ISA (there may be airplanes certified to ISA +40), ISA being 15C at sea level and dropping from there at the standard adiabatic lapse rate .
ISA temperature at Phoenix airport at 1135 ft ...