The DNV Standard no. DNV-DS-E403 includes following chapters - General Information; Surface diving systems - Design philosophy and premises; Pressure vessels for gas storage, human occupancy, and other purposes; Life support systems including piping, valves, hoses, fittings, umbilicals and compressors; Electrical systems; Fire prevention, detection and extinction; LARS - Launch and recovery systems; Instrumentation and communications; Evacuation systems; Selection of safety objective.

The declared objectives of the present standard were to give the guidance and applicable criteria on the design, manufacture, installation and testing/commissioning of the surface diving systems that employ air or nitrox as the breathing medium. It shall provide the standard of safety for such system that would be internationally acceptable, by means of defining the minimum requirements to the design/manufacture, installation and operation/maintenance and repair of these systems; it shall also serve as a technical reference book for classification and verification, as well as to assist in contractual matters between contractor and purchaser of the diving system; the standard can also be treated as a good guidebook for the designers, contractors and buyers of the above mentioned equipment.

This document contains the distances between the ports located in the United States, it also provides users with the distances between ports in the Great Lakes as well as Canadian ports and ports in St. Lawrence river. Subject distances have been measured along navigable track lines. The geographical coordinated of arrival and departure have been stated for centrally located piers inside ports.

Note that all distances between ports are in nm, i.e. nautical miles, except the distances in the tables addressing Mississippi River System as well as Great Lakes plus other inland waters - subject distances are given in statute miles. In case two or more navigation routes converge, they have been shown in capital letters. The publication is usually prepared and released by NOS, standing for the National Ocean Service, in collaboration with the NOAA, i.e. National Oceanic and Atmospheric Administration, and Office of Coast Survey.

The title of the publication is pretty clear and does not require any further explanation - it is intended to provide users with the distances they will use for navigation when planning their voyages. The book starts with a part providing general information and followed by the main content with the tables giving the distances. Some of the supplementary tables are also provided, e.g. for the estimation of transit time, determination of the wind speed etc.

Video Lectures on Hydrostatics and Stability presented by Dr. Hari V. Warrior. Lecture 1 - Introduction.

Video Lectures on Hydrostatics and Stability presented by Dr. Hari V. Warrior. Lecture 13 - Stability Curve.

Video Lectures on Hydrostatics and Stability presented by Dr. Hari V. Warrior. Lecture 14 - Dynamical Stability - I.

Video Lectures on Hydrostatics and Stability presented by Dr. Hari V. Warrior. Lecture 15 - Dynamical Stability - II.

Video Lectures on Hydrostatics and Stability presented by Dr. Hari V. Warrior. Lecture 19 - Dynamical Stability - III.

Video Lectures on Hydrostatics and Stability presented by Dr. Hari V. Warrior. Lecture 21 - Righting Stability - I.