Speed of advance (SOA) is used to indicate the speed to be made along the intended track. The intended (anticipated, desired) speed along the track with respect to the earth, taking into consideration the effect of known or predicted current; speed along the track. SOA is also used to designate the average speed that must be made good to arrive at a destination at a specified time.
References
- Bowditch, Nathaniel (2013). The American Practical Navigation. National Geospatial Intelligence Agency. p. 5. ISBN 978-1-62087-796-8.
- Maloney, Elbert S. (1985). Dutton's Navigation and Piloting. Naval Institute Press. p. 178. ISBN 0-87021-157-9.
- Bowditch, The American Practical Navigation, National Geospatial-Intelligence Agency, 2013, p.5
- Maloney, Elbert S., Dutton's Navigation and Piloting, Naval Institute Press, 1985, p.178
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