The Celtwix is a channel that connects the Brinkforth sea with the Celene of Canath, which famously enjoys little traffic due to the lack of interesting locations to its west combined with its difficult tides and many whirlpools. The eastern edge of the channel is also home to the Celtwix Strait, which roughly spans between the shore of Fort Kiltox and the peninsular-island settlement Isthram Sedu.