Reaching an isolated fishing village by boat can mean entering a narrow inlet where the depth changes with the tide, currents can push a boat across the entrance, and there may be little room to turn around or find another anchorage. Before I enter, I make three checks: I work out the available depth and the tide's timing, assess how the current moves through the entrance, and decide where the boat can be safely anchored if conditions change. These checks take only a few minutes, but they can make the difference between a straightforward arrival and a difficult one.

Make a Tide Plan Before Entering a Remote Inlet

Before entering a remote inlet, I check the tide, available depth, and the time window for the approach. I write the key information on a small whiteboard or a laminated sheet so I can refer to it easily as I approach. Here’s what goes on it:

• High and low tide times at the nearest tide station, adjusted for the inlet if local chart information provides a correction.
• The boat’s draft and the minimum depth I need beneath the keel for the conditions I expect.
• The shallowest point on the route into the inlet, including the depth over the bar or the shallowest charted sounding, and how much tide height I need to clear it.
• My go/no-go time window, based on the predicted tide and currents, the charted depths, and the conditions on the day.

Keep the information simple and easy to read as you approach the inlet. Use large, clearly written figures rather than small notes or detailed calculations. I also write down an exit plan: where I can turn around and which route I will take back out if the depth, current, visibility, or other conditions are worse than expected. Tide predictions and charted depths cannot account for every condition on the day, so I use the plan as a guide and reassess conditions as I approach.

I'll add some notes here from doing this in the real world: First, tide tables are only as good as the station. Inlets near river mouths can lag or lead, and wind can pile water in or suck it out. Second, don’t confuse “tide height” with “current.” You can have enough depth and still get shoved sideways.

Check Cross-Current Before Entering a Narrow Channel

A calm-looking inlet can still have strong cross-currents or rougher water near the entrance. These conditions may not be obvious from offshore, particularly where rocks, headlands, or shoals shelter part of the entrance. Before entering a narrow channel between rocks or shoals, I may use a small floating marker to observe the direction and approximate speed of the surface current. I watch how the marker moves relative to a fixed point, such as a buoy or shoreline feature. I use this only as a quick visual check and compare it with the charted and predicted current information, rather than treating the marker as a precise measurement.

Outside the entrance, I recommend slowing down in an area with enough room to maneuver and briefly putting the engine in neutral. Release the marker on the leeward side, where the wind is less likely to push it back toward the boat. Then observe two things:

1. Angle of drift: Is it sliding straight in, straight out, or sideways across the line I want to steer?
2. Speed of drift: Does the marker move slowly, or is the current strong enough to move it quickly?

If the marker is drifting sideways across the entrance, the boat will also be pushed sideways by the current. The helm may need to point the boat slightly into the current rather than directly toward the channel. A clear reference point on the upcurrent side of the entrance can make this easier: aim toward that point and let the current carry the boat toward the intended track.

Unfortunately, the sideways push often gets stronger right where you least want it, at the constriction. The water accelerates, and the boat can be pushed sideways across the intended course. If the marker accelerates as it approaches the narrow entrance, the current may be stronger there than expected. In that situation, wait for a weaker current if conditions allow, or postpone the approach until there is more daylight and better room to maneuver.

GPS can also show how much the current is pushing the boat off course by comparing the direction the boat is pointing with the direction it is actually moving. I still use that information, but a floating marker gives me a quick visual check. It lets everyone on board see which way the water is moving instead of having to interpret numbers on a screen.

Plan Your Anchorage for Changing Tides and Wind

In places where the seabed shallows quickly and the water level changes significantly with the tide, I plan for the boat's position and available depth to shift during the night. Before anchoring, I also check local restrictions and avoid sensitive seabed habitats, such as seagrass, where possible. If the anchorage allows it, I may use a second anchor or the shoreline to limit the boat’s swing, but only after checking the expected tidal range, wind shifts, depth, and the boat's room to move.

A few specifics that matter in practice:

• Chafe gear: Anything that touches a rock edge or a dock corner gets chafe protection. Old fire hose, purpose-made chafe sleeve, even a doubled-up rag in a pinch.
• Stern line leads: Run the line outside the lifelines and avoid sharp turns around stanchions or other fittings. Check that it has a smooth lead and is protected from chafing, especially if the boat will move against the line with the tide.
• Slack for tide: Leave enough slack in the stern line for the water level to fall and rise. A line that is too tight can put excessive strain on the boat or interfere with the main anchor.

I also check the depth behind the boat with the depth sounder and assess how quickly the seabed rises toward shore. A gently sloping, soft-mud bottom may allow for some settling as the tide falls, while a steep or hard bottom requires greater distance from shore.

Conditions can change quickly in a small inlet. The wind may change direction overnight, the current may reverse with the tide, and the boat may swing around its anchor as conditions change. Using a second anchor or shoreline can help limit that movement, but it does not remove the need to allow enough room and depth for the boat to move safely.