The team used the callsign OJ0EME while on the reef and operated on the 2m, 7cm, 23cm, 13cm, 9cm, 6cm and 3cm amateur radio bands.
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DXCC: OJ0 – Market Reef
IOTA: EU-053 – Market Reef
CQ Zone: 15
QRA: JP90NH
At 19:44UTC on Sunday 18th June 2023, one of the team made contact via the Qatar-OSCAR 100 satellite transponder with Josep EA3A a Spanish radio amateur.
The transponder has an uplink on 2.4GHz and a downlink on 100GHz and was a joint project between the Qatar Satellite Company, Qatar ARS and AMSAT (Deutschland). It is on board the Es-hail-2 satellite which was launched in 2018. The satellite is in geo-stationary orbit above the equator at 26 degrees East.
Market Reef (Märket) is a small n the Baltic Sea The skerry has shared sovereignty between Sweden and Finland under the Treaty of Fredrikshamn of 1809. The 3-hectare (8.2-acre) island is uninhabited but does have a lighthouse.