30 MHz Asian shipping frequencies question

[W1KNE]

This may be directed at @kkn50 , what did you hear on these?
On 31.775, I had a brief audio key up with these melodic tones. It faded as fast as it came on.

 

[kkn50]

This may be directed at @kkn50 , what did you hear on these?
On 31.775, I had a brief audio key up with these melodic tones. It faded as fast as it came on.

The only thing I've ever logged on that frequency is US military.