Total System Error (TSE)

From International Dictionary of Marine Aids to Navigation
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The overall navigation performance can be described by the TSE. Assuming the contributions to TSE from NSE and VTE are random, the TSE can be described as: TSE2 = NSE2 + VTE2

Source: Nick Ward, Vicechair, IALA e-Nav Committee, March 2009

Total System Error

Navigation System Error

Vessel Technical Error

International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM