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  2. Marshall Islands stick chart - Wikipedia

    en.wikipedia.org/wiki/Marshall_Islands_stick_chart

    The Marshallese recognized four main ocean swells: the rilib, kaelib, bungdockerik and bundockeing. [2] Navigators focused on effects of islands in blocking swells and generating counterswells to some degree, but they mainly concentrated on refraction of swells as they came in contact with undersea slopes of islands and the bending of swells around islands as they interacted with swells coming ...

  3. SOFAR channel - Wikipedia

    en.wikipedia.org/wiki/SOFAR_channel

    Where bottom profile intrudes into the sound channel propagation is bottom limited. Within the duct sound waves trace a path that oscillates across the SOFAR channel axis so that a single signal will have multiple arrival times with a signature of multiple pulses climaxing in a sharply defined end.

  4. Glossary of nautical terms (A–L) - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_nautical_terms...

    1. A position half way along the length of a ship or boat. [13] 2. A position half way between the port and starboard sides of a ship or boat, as in "helm amidships", when the rudder is in line with the keel. [13] ammunition ship A naval auxiliary ship specifically configured to carry ammunition, usually for combatant ships and aircraft.

  5. Crossword abbreviations - Wikipedia

    en.wikipedia.org/wiki/Crossword_abbreviations

    Taking this one stage further, the clue word can hint at the word or words to be abbreviated rather than giving the word itself. For example: "About" for C or CA (for "circa"), or RE. "Say" for EG, used to mean "for example". More obscure clue words of this variety include: "Model" for T, referring to the Model T.

  6. List of words having different meanings in American and ...

    en.wikipedia.org/wiki/List_of_words_having...

    one who takes care of a building, e.g. a school (US: janitor; cf. s.v. custodian) one put in charge of a farm after eviction of tenant one who takes care of someone or something stopgap government or provisional government: one who takes care of real estate in exchange for rent-free living accommodations * carnival

  7. Crossword - Wikipedia

    en.wikipedia.org/wiki/Crossword

    An American-style 15×15 crossword grid layout. A crossword (or crossword puzzle) is a word game consisting of a grid of black and white squares, into which solvers enter words or phrases ("entries") crossing each other horizontally ("across") and vertically ("down") according to a set of clues. Each white square is typically filled with one ...

  8. Communications system - Wikipedia

    en.wikipedia.org/wiki/Communications_system

    An optical communication system is any form of communications system that uses light as the transmission medium. Equipment consists of a transmitter, which encodes a message into an optical signal, a communication channel, which carries the signal to its destination, and a receiver, which reproduces the message from the received optical signal.

  9. Communication channel - Wikipedia

    en.wikipedia.org/wiki/Communication_channel

    Mathematical models of the channel can be made to describe how the input (the transmitted signal) is mapped to the output (the received signal). There exist many types and uses of channel models specific to the field of communication. In particular, separate models are formulated to describe each layer of a communication system.