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Timestamp Discrepancies in Multisensor NMEA Environment during Survey Voyage

Banyś P., Engler E., Heymann F., Noack T.

Zeszyty Naukowe / Akademia Morska w Szczecinie

2013

nr 36 (108) z. 1

22--26

The standard for interfacing marine electronic devices (NMEA – National Marine Electronics Association), does not provide unambiguous information regarding the reliability of data and its timing. In this paper, time delays in navigational data are investigated. For this purpose AIS and navigational data collected offshore and onshore are used. The investigations are concentrated on lags among various NMEA sentences recorded in a relational database during the survey voyage. The analysis is based on standard elements of descriptive statistics.