Final answer:
Stay near the shore when paddling a canoe upstream to avoid strong currents and move towards the middle when canoeing downstream for faster travel and to avoid potential obstacles.
Step-by-step explanation:
When navigating in a narrow channel, the position of your boat can significantly impact your safety and ease of travel. If you are paddling a canoe upstream, it is generally best to stay as close to the shore as possible. The reason for this is that the water near the shore is often calmer and you can avoid the stronger currents found in the middle of the river, which can make paddling more difficult and exhausting.
Conversely, when canoeing downstream, it's usually advisable to navigate closer to the middle of the channel. This is because the current is with you, and staying near the middle can help you move faster and avoid potential obstacles that might be present closer to the shore, such as rocks or branches. Staying near the middle also minimizes the chances of being caught in eddies or countercurrents that might be found near the banks of the river or channel.
When navigating in a narrow channel, it is important to consider the flow of water. When paddling a canoe upstream, it is wisest to position your boat as near to the shore as possible. This is because the water near the shore is typically slower-moving and allows for easier navigation against the current. On the other hand, when canoeing downstream, it may be best to stay near the middle of the channel. This is because the water near the middle tends to have a faster flow and can help you maintain a straighter course.