WELCOME TO THE SS BADGER
 |  |
Navigating the Queen of the Lakes: The Captain's Toolkit Aboard the SS Badger
Abstract
The SS Badger is a unique maritime vessel, a coal-fired, steam-powered car ferry that has been traversing Lake Michigan since 1953. While her propulsion system is a celebrated piece of history, her safe navigation relies on a sophisticated suite of modern and traditional tools. Let us explore the primary instruments at the captain's disposal to guide the 410-foot vessel on its daily 60-mile, four-hour journey between Ludington, Michigan, and Manitowoc, Wisconsin, outlining their functions and operational principles.
1. Introduction
Sailing the SS Badger across Lake Michigan presents a significant navigational challenge. The lake is vast, prone to rapidly changing weather, dense fog, and can host considerable commercial and recreational traffic. The captain and bridge crew are responsible for the safety of hundreds of passengers and vehicles. To accomplish this, they employ an integrated system of electronic, magnetic, and mechanical tools, blending century-old principles with modern precision to ensure a safe and on-schedule crossing.
2. Primary Navigational Instruments
The bridge of the SS Badger is the nerve center of the ship, where information from various sources is synthesized to make critical decisions. The key tools include:
Radar (Radio Detection and Ranging):
The Badger is equipped with modern marine radar systems, which are arguably the most critical tool for navigating in low-visibility conditions such as fog, heavy rain, or darkness.
Operation:
The radar antenna, a rotating scanner located high on the mast, emits pulses of microwave radio energy. These pulses travel outwards, and when they strike an object (another vessel, a buoy, or the coastline), they are reflected back to the scanner. The system's computer measures the time it takes for the echo to return, calculating the distance to the object using the formula d=2c⋅t, where d is the distance, c is the speed of light, and t is the round-trip time. The direction from which the echo returns indicates the object's bearing. This information is displayed on a screen, painting a real-time map of the surrounding area, allowing the crew to detect and track other vessels to avoid collisions.
GPS (Global Positioning System) and Chart Plotter:
The advent of GPS has revolutionized marine navigation. The SS Badger utilizes commercial-grade GPS receivers integrated into an Electronic Chart Display and Information System (ECDIS), commonly known as a chart plotter.
Operation:
The GPS receiver constantly communicates with a constellation of satellites orbiting the Earth. By triangulating signals from at least four satellites, the receiver can calculate the ship's precise latitude, longitude, speed over ground (SOG), and course over ground (COG) with remarkable accuracy. This position is then continuously plotted on a detailed electronic nautical chart. The captain can pre-plan the entire voyage, setting waypoints that create a digital "highway" across the lake. The system shows the ship's real-time position relative to this course line, navigational aids, and known hazards, making course-keeping highly efficient.
Gyrocompass and Magnetic Compass:
While GPS provides position, the compass provides heading—the direction the ship's bow is pointed.
Gyrocompass Operation:
This is the primary directional instrument. A gyrocompass contains a rapidly spinning gyroscope whose axis is cleverly constrained by gravity to align itself with the Earth's rotational axis. Therefore, it always points to true north, not magnetic north. This makes it immune to the magnetic deviation caused by the ship's own steel hull and is essential for accurate course-steering and for providing a stable heading reference to the radar and autopilot systems.
Magnetic Compass Operation:
As a crucial backup, the Badger is also equipped with a traditional magnetic compass. It operates on the principle of a magnetized needle aligning with the Earth's magnetic field lines to point to magnetic north. The crew must apply corrections for magnetic variation (the angle between true north and magnetic north) and deviation (the ship's own magnetic field) to derive a true heading. Its independence from the ship's electrical power makes it an indispensable failsafe device.
AIS (Automatic Identification System):
AIS is a vital tool for collision avoidance in high-traffic areas.
Operation:
The Badger's AIS transceiver automatically broadcasts the ship's identity, position, course, and speed to other AIS-equipped vessels in the vicinity. Simultaneously, it receives the same information from those vessels. This data is overlaid on the radar and chart plotter displays, showing not just the position of another ship, but its name, size, and intended course. This allows the bridge crew to anticipate the movements of other commercial vessels long before they become a visual or radar contact.
3. Ship Control and Monitoring
Navigating is only part of the task; controlling the massive vessel is the other.
Engine Order Telegraph (E.O.T.):
While the bridge has direct control over the engines in modern ships, the Badger's historic steam propulsion requires a classic communication system. The captain uses the E.O.T. on the bridge to signal engine commands like "Full Ahead," "Half Astern," or "Stop" to the engine room. An engineer below acknowledges the command on their E.O.T. and manually operates the throttles of the two Skinner Unaflow steam engines to match the order. This system is a testament to the teamwork required to operate the vessel.
Weather Monitoring:
The crew has access to up-to-the-minute weather information via satellite services and VHF radio broadcasts (NOAA Weather Radio). This includes data on wind speed and direction, wave height, and the movement of weather systems. This information is critical for ensuring passenger comfort and safety, and may lead the captain to alter course or speed to mitigate the effects of heavy seas.
4. Conclusion
The safe passage of the SS Badger across Lake Michigan is a masterful blend of old and new. The captain does not rely on a single instrument, but on the integrated use of a suite of robust tools. Radar and AIS provide the eyes for seeing through fog and darkness, GPS and the chart plotter provide the map, and the gyrocompass provides the unerring sense of direction. Backed by the reliability of the magnetic compass and managed through the classic teamwork of the Engine Order Telegraph, these systems empower the captain to confidently command the historic steamship. This fusion of 21st-century satellite technology and 20th-century steam power ensures the "Queen of the Lakes" continues to be a safe and reliable fixture on Lake Michigan. Sources
 SS BADGER 1875 |  SS BADGER TODAY |
RSS Feed