DLR was first published in Taylor, David W. (1910). The Speed and Power of Ships: A Manual of Marine Propulsion. p. 99.
DLR can be used to compare the relative mass of various boats no matter what their length. A DLR less than 200 is indicative of a racing boat, while a DLR greater than 300 or so is indicative of a heavy cruising boat.
|light||90 to 180|
|moderate||180 to 270|
|heavy||270 to 360|
|ultraheavy||360 and up|
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