noun, noun or participle which takes 'suru'
going north; northward travel
Neutral term for traveling or heading north, used as a noun or with する.
列車は北行している。
The train is heading north.
北行の飛行機に乗る。
I board a northbound flight.
Compound of 北 (north) and 行 (going). The reading ほっこう is a regular on'yomi combination.