A barge loaded with useless rocks awaited the Seekers and the Watchers. They were to crew the vessel under the pretense of a barge crew delivering an ore shipment to Issica so that they could leave the city undetected. To go upriver, barges are connected to long chains and pulled through the current. The barge would be connected to various winching stations along the journey through the Graywater caverns. Once on the surface and in calmer waters, the crew would push the barge forward with sturdy poles.
To disembark, the Seekers need only pull a lever and hop on the barge.