That night, he stood on the bridge. The gyro display read 273.8. The magnetic compass, which he had mocked, pointed to 269.2. Polaris was patient overhead.
Tanaka nodded, unimpressed. "So, like a GPS."
Page 1-2: "The CMZ 700 utilizes a dynamically tuned ring laser gyro. No moving parts. Settling time: 3 hours." No moving parts. That felt wrong to Saito. A ship without a spinning wheel of bronze and copper was like a heart without a beat. But the numbers were seductive. Accuracy: 0.01 degrees secant latitude. Mean time between failure: 50,000 hours.
Undefined. Saito had never seen that word in a manual. Not "error." Not "failure." Undefined.
"No," Saito said, not looking up from the manual. "It points to true north. The axis of the Earth. The spin of the planet itself. Magnets are for children's toys."
He returned to the manual. Page 4-17: It described a phenomenon called settling error —a phantom offset caused by the gyro aligning not to true north, but to a plane of rotation influenced by the ship’s own course changes. The cure was a "latitude damping" reset. He performed it. The display flickered, reset, and returned to 271.3.
That night, he stood on the bridge. The gyro display read 273.8. The magnetic compass, which he had mocked, pointed to 269.2. Polaris was patient overhead.
Tanaka nodded, unimpressed. "So, like a GPS."
Page 1-2: "The CMZ 700 utilizes a dynamically tuned ring laser gyro. No moving parts. Settling time: 3 hours." No moving parts. That felt wrong to Saito. A ship without a spinning wheel of bronze and copper was like a heart without a beat. But the numbers were seductive. Accuracy: 0.01 degrees secant latitude. Mean time between failure: 50,000 hours.
Undefined. Saito had never seen that word in a manual. Not "error." Not "failure." Undefined.
"No," Saito said, not looking up from the manual. "It points to true north. The axis of the Earth. The spin of the planet itself. Magnets are for children's toys."
He returned to the manual. Page 4-17: It described a phenomenon called settling error —a phantom offset caused by the gyro aligning not to true north, but to a plane of rotation influenced by the ship’s own course changes. The cure was a "latitude damping" reset. He performed it. The display flickered, reset, and returned to 271.3.