In mid-March, the first pair of red & green markers were missing just east of Saba Rock. This is the narrowest and shallowest part of the channel to ONB. I draw 4'2" and have measured 2'6" under my keel with a calibrated depthsounder so there are at least some coral heads at 6-7'. Take it slow and don't stray too close to BEYC shoreline in this area. Once past BEYC the channel widens and you have plenty of depth.

If you're returning from ONB to North Sound in late afternoon you'll have the sun in your eyes. The tedency is to take a straight course towards the passage between Saba Rock and BEYC but this will put you on the reef just north of BEYC where the markers are missing. Stay a bit to port to veer around this reef.