IMO Recommendations on DSC test Calls

The IMO issued a circular recommending that coast station test calls on medium frequency/high frequency (MF/HF) by means of digital selective calling (DSC) be limited to once a week. Excessive test calls on DSC distress and safety frequencies have been overloading the system to the point where interference to actual distress and safety calls has become a cause for concern. COMSAR/Circ. 35 Source: HK Law