At some point in your travels here and there by boat, you may have to request a bridge opening.
Here's how to do it right.
Whether you have to deal with bridges only occasionally or every day, you'll probably have to deal with them at least sometimes. If your boat has very little air draft, you may think there's not much to worry about. But there may be, and the issue of whether you're too tall to get under is only one of many. Here's what to expect when your way is blocked by spans of steel and cement with eighteen-wheelers flying overhead.
Obviously, you must avoid bridge pilings and the structure surrounding bridges. But you must also deal with eddies around them, which may affect your steering. Sailboats have particular issues because the wind may change, causing temporary calms or shifts. It is usually imprudent, and often illegal, to use sails to go through a bridge – unless that's your only means of propulsion. The pilings may obstruct vision, which is important regarding oncoming traffic, but also for avoiding small boats that often hang out around the pilings to fish.
Usually boats must funnel through a particular span of a bridge, which may require opening. Special right-of-way considerations may come into play. For example, if a boat is heading with the current, other boats heading into the current should normally let the boat being pushed come through first. Smaller nimble boats should generally stay out of the way of a large boat with more limited maneuverability. An outboard skiff darting around the bow of a ponderously moving tug and barge may be obscured from view of the pilothouse. This is true anytime, but particularly in areas of restricted maneuverability around a bridge. And what boater can possibly think his engine can never fail at just the wrong time?
Requested Vs. Scheduled
Many bridges must open to let taller boats through. Sometimes these bridges open on request if given proper signal, but many bridges only open at scheduled times. Always signal the bridge for an opening. Signals include horn blasts (usually a long and a short), but most boats call the bridge tender on the VHF. Bridges stand by on channel 9 or 13, depending on location. Call the bridge by its name (e.g., North Landing Bridge, Barefoot Landing Bridge, Seventeenth Street Causeway Bridge). Otherwise the wrong bridge may think you need an opening. Names of bridges and proper VHF channels are best found in updated guidebooks, where you will also find local rules and customs. Be aware that some bridge names may change. For many years, tugs going through the Atlantic Intracoastal Waterway (AICW) swing bridge south of Little River Inlet, South Carolina, called it, melodically, the “Little River Swing” (pronounced “swang.”) Now the bridge is named the “Captain Archie Neil ‘Poo’ McLauchlin Swing Bridge” after a well-known local legend. The captain may be sitting in his favorite establishment watching as you go by.
It’s often difficult to plan ahead for scheduled bridge openings because typically the current will change in the channel ahead. This is particularly true in areas where inlets or creeks run to larger bodies of water, such as the ocean. A creek may produce current, speeding you along, but as you pass its intersection, the current turns against you. People who simply plug distance to run into a chartplotter are often fooled.
Communication Is Key
Even if the boat ahead of you has requested an opening, you also should request one so that the bridge tender knows how many boats are coming through. We’ve known bridges to close on boats that haven’t properly notified the operator. Often, when the bridge is in the open position, the bridge tender has limited visibility. Going through in a single file line is usually best because boats on the other side may also be coming through and space is limited.
Sometimes a bridge tender will instruct pleasure boats to wait for a tug and barge or other vessels because of that vessel’s special needs or space limitation. Pay attention. Keep a VHF tuned to the bridge’s operating channel well before you approach the bridge, as well as during the transit, because there may be special issues such as a malfunctioning bridge, a fire/rescue vehicle approaching on the highway, or other problems. If you know in advance, you can slow down and come through when the situation has cleared.
Into The Melee
When you reach a bridge, there may well be a crowd of boating traffic. If the bridge opens only on a schedule or is otherwise restricted (such as bridge work or emergency highway traffic), it is critically important to take into consideration the special maneuvering needs of other boats (including your own) when you’re waiting in a crowd. Try to stay clear. For example, often a sailboat will have little control when backing or require a wide turning radius. Large vessels may have very little maneuverability in tight quarters. Often a tug with a barge must simply keep coming, unable to dodge around smaller boats.
Some vessels may have huge windage issues that make steering and positioning very difficult, especially if the wind is blowing across the channel or toward the bridge. Others, such as deep draft vessels, may be susceptible to strong currents pushing them toward the bridge and may need to face away from the bridge into the current or wind until the opening. Then it will have to turn, and there might not be room to do so within its turning radius. And just as boats have different handling characteristics, skippers have different skill levels. We’ve passed through many bridges over the years, and my favorite tactic is to remain at the end of the line to hopefully avoid trouble. Don’t hang too far back, though, because the bridge tender has an obligation to get the highway traffic moving when he can.
To make matters worse, some bridges are situated poorly from a boat operator’s perspective. The Wappoo Creek Bridge just south of Charleston, for example, spans a narrow channel that doglegs. The current is immense, and a large boat coming through on a fair tide may have trouble making the turn. And this bridge usually operates on a schedule. Check the charts to get the “lay of the land” long before you approach a bridge.