Tug Stability Yellow Sea and intercoastal limits—

and intercoastal limits—

North Limit 29� 41'

and oscillation period all exceed the International Organization of Standards norm

International maritime signal message: "Diver below (when stationary)

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Tug Stability Yellow Sea and intercoastal limits—Over the years numerous harbor tugs have capsized, often with tragic consequences. Stability is a complex subject and mainly a specialism of naval architects. Tug masters seldom have this detailed knowledge yet they experience the effects of a tugs stability every day when maneuvering their tug, either free sailing or when assisting ships. It is, therefore, not just desirable but necessary for tug masters to have at least a basic idea of the elements