RV Investigator TEMPO Voyage: 460 Hours of Antarctic Sonobuoy Recordings

251 sonobuoys deployed during the RV Investigator voyage IN2021_V01 collected approximately 460 hours of underwater acoustic recordings. The data, contributed by the Australian Ocean Data Network, were gathered between 29 January and 24 March 2021 on a voyage from Hobart to Hobart. Recordings include marine mammal vocalizations and support krill abundance studies for the TEMPO survey.

Use Cases

• Detect blue whale and sperm whale presence based on acoustic recordings mentioned in the description
• Map marine mammal distribution patterns based on sonobuoy deployment coordinates
• Study krill-predator relationships based on complementary acoustic and visual observation data
• Analyze ocean ambient noise levels based on Directional Frequency Analysis and Recording (DIFAR) data

Strengths

• Approximately 460 hours of audio recordings from 251 deployed sonobuoys
• Specific voyage time range from 29 January to 24 March 2021
• Recordings target multiple whale species and seal vocalizations as listed

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment

Provenance

Source

Australian Ocean Data Network

Collection Method

Acoustic data collected using DIFAR sonobuoys deployed at 30 nmi intervals during a research voyage.

Time Range

29 January to 24 March 2021

Freshness

Last updated 2026-04-28 12:20:18.295983; freshness should be verified

Geography

Voyage from Hobart (TAS) to Hobart, focusing on the Australian Antarctic Territory.