Communications with an emission of J3E would typically have a channel spacing of?

The emission designator J3E refers to single sideband amplitude modulation (SSB-AM), which is primarily used for voice communications. In the context of maritime communications using GMDSS (Global Maritime Distress and Safety System), J3E is commonly utilized in HF (High Frequency) bands.

In order to avoid interference between channels and to ensure clear communications, the appropriate channel spacing for J3E emission is generally set at around 3.0 kHz. This spacing allows enough bandwidth for the SSB signal without causing overlap with adjacent channels, which is crucial in maintaining the integrity and clarity of communications, particularly in busy maritime environments.

Using a channel spacing of 3.0 kHz ensures that operators can effectively communicate without the risk of channel interference, which is essential for safety and operational effectiveness in maritime operations. Therefore, the choice of 3.0 kHz aligns correctly with standard practices in J3E communications.