Definition(s)
Lowest Astronomical Tide
Level of low tide when all harmonic components causing the tides are in phase
NOTE The harmonic components are in phase approximately once every 19 years, but these conditions are approached several times each year.
Source: API RP 2MET, Derivation of Metocean Design and Operating Conditions, First Edition, November 2014. Global Standards
Lowest Astronomical Tide
Level of low tide when all harmonic components causing the tides are in phase. NOTE The harmonic components are in phase approximately once every 19 years, but these conditions are approached several times each year. [ISO 19901-1:2005, definition 3.12]s are approached several times each year. [ISO 19901-1:2005, definition 3.12].
Source: ISO 19905-1:202, Petroleum and natural gas industries – Site-specific assessment of mobile offshore units – Part 1: Jack-ups. Global Standards