Definition(s)
Chart Datum
local datum used to fix water depths on a chart or tidal heights over an area
NOTE Chart datum is usually an approximation to the level of the lowest astronomical tide.
Source: API RP 2MET, Derivation of Metocean Design and Operating Conditions, First Edition, November 2014. Global Standards
Chart Datum
Local datum used to fix water depths on a chart or tidal heights over an area. NOTE Chart datum is usually an approximation to the level of the lowest astronomical tide.[ISO 19901-1:2005, definition 3.2].
Source: ISO 19905-1:202, Petroleum and natural gas industries – Site-specific assessment of mobile offshore units – Part 1: Jack-ups. Global Standards