10h
10h is a compact notation representing ten hours. In timekeeping and scheduling, the letter h is the conventional symbol for the hour, and a suffix like 10h indicates a duration of ten hours. This form is common in timetables, flight durations, and logs where concise, unit-suffixed values are useful. In some contexts, ISO 8601 durations use the format PT10H to denote ten hours, which can be extended with minutes or seconds (for example PT10H30M).
In times-of-day notation, 10h can sometimes be used to indicate 10:00 hours, though the more common representation
In astronomy, right ascension is measured in hours, minutes, and seconds because the celestial sphere completes
Outside timekeeping and astronomy, 10h can appear in product codes, model numbers, or shorthand in notes. As