fathom | 1 ftm | 2 ftm | 3 ftm | 4 ftm | 5 ftm | 6 ftm | 7 ftm | 8 ftm | 9 ftm | 10 ftm | 11 ftm | 12 ftm | 13 ftm | 14 ftm | 15 ftm | 16 ftm | 17 ftm | 18 ftm | 19 ftm | 20 ftm | 21 ftm | 22 ftm | 23 ftm | 24 ftm | 25 ftm | 26 ftm | 27 ftm | 28 ftm | 29 ftm | 30 ftm | 31 ftm | 32 ftm | 33 ftm | 34 ftm | 35 ftm | 36 ftm | 37 ftm | 38 ftm | 39 ftm | 40 ftm | 41 ftm | 42 ftm | 43 ftm | 44 ftm | 45 ftm | 46 ftm | 47 ftm | 48 ftm | 49 ftm | 50 ftm | 51 ftm | 52 ftm | 53 ftm | 54 ftm | 55 ftm | 56 ftm | 57 ftm | 58 ftm | 59 ftm | 60 ftm | 61 ftm | 62 ftm | 63 ftm | 64 ftm | 65 ftm | 66 ftm | 67 ftm | 68 ftm | 69 ftm | 70 ftm | 71 ftm | 72 ftm | 73 ftm | 74 ftm | 75 ftm | 76 ftm | 77 ftm | 78 ftm | 79 ftm | 80 ftm | 81 ftm | 82 ftm | 83 ftm | 84 ftm | 85 ftm | 86 ftm | 87 ftm | 88 ftm | 89 ftm | 90 ftm | 91 ftm | 92 ftm | 93 ftm | 94 ftm | 95 ftm | 96 ftm | 97 ftm | 98 ftm | 99 ftm | 100 ftm |
line | 864 ln | 1 728 ln | 2 592 ln | 3 456 ln | 4 320 ln | 5 184 ln | 6 048 ln | 6 912 ln | 7 776 ln | 8 640 ln | 9 504 ln | 10 368 ln | 11 232 ln | 12 096 ln | 12 960 ln | 13 824 ln | 14 688 ln | 15 552 ln | 16 416 ln | 17 280 ln | 18 144 ln | 19 008 ln | 19 872 ln | 20 736 ln | 21 600 ln | 22 464 ln | 23 328 ln | 24 192 ln | 25 056 ln | 25 920 ln | 26 784 ln | 27 648 ln | 28 512 ln | 29 376 ln | 30 240 ln | 31 104 ln | 31 968 ln | 32 832 ln | 33 696 ln | 34 560 ln | 35 424 ln | 36 288 ln | 37 152 ln | 38 016 ln | 38 880 ln | 39 744 ln | 40 608 ln | 41 472 ln | 42 336 ln | 43 200 ln | 44 064 ln | 44 928 ln | 45 792 ln | 46 656 ln | 47 520 ln | 48 384 ln | 49 248 ln | 50 112 ln | 50 976 ln | 51 840 ln | 52 704 ln | 53 568 ln | 54 432 ln | 55 296 ln | 56 160 ln | 57 024 ln | 57 888 ln | 58 752 ln | 59 616 ln | 60 480 ln | 61 344 ln | 62 208 ln | 63 072 ln | 63 936 ln | 64 800 ln | 65 664 ln | 66 528 ln | 67 392 ln | 68 256 ln | 69 120 ln | 69 984 ln | 70 848 ln | 71 712 ln | 72 576 ln | 73 440 ln | 74 304 ln | 75 168 ln | 76 032 ln | 76 896 ln | 77 760 ln | 78 624 ln | 79 488 ln | 80 352 ln | 81 216 ln | 82 080 ln | 82 944 ln | 83 808 ln | 84 672 ln | 85 536 ln | 86 400 ln |
A fathom is a unit of length in the imperial and the U.S. customary systems equal to 6 feet (1.8288 metres), used especially for measuring the depth of water.
There are two yards (6 feet) in an imperial fathom. Originally the span of a man's outstretched arms, the size of a fathom has varied slightly depending on whether it was defined as a thousandth of an (Admiralty) nautical mile or as a multiple of the imperial yard. Formerly, the term was used for any of several units of length varying around 5–5 1⁄2 feet.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
fathom | ftm | ≡ 6 ft | = 1.8288 m | Imperial/US |
fathoms | lines | fathoms | lines |
---|---|---|---|
1 | = 864 | 4 | = 3456 |
1.5 | = 1296 | 4.5 | = 3888 |
2 | = 1728 | 5 | = 4320 |
2.5 | = 2160 | 5.5 | = 4752 |
3 | = 2592 | 6 | = 5184 |
The line (abbreviated L or l) was a small English unit of length, variously reckoned as 1⁄10, 1⁄12, 1⁄16, or 1⁄40 of an inch. It was not included among the units authorized as the British Imperial system in 1824.
Name of unit | Symbol | Definition | Relation to SI units | Unit System |
---|---|---|---|---|
line | ln | ≡ 1⁄12 in | = 0.002116 m | Imperial/US |
lines | fathoms | lines | fathoms |
---|---|---|---|
1 | = 0.0011574074074074 | 4 | = 0.0046296296296296 |
1.5 | = 0.0017361111111111 | 4.5 | = 0.0052083333333333 |
2 | = 0.0023148148148148 | 5 | = 0.005787037037037 |
2.5 | = 0.0028935185185185 | 5.5 | = 0.0063657407407407 |
3 | = 0.0034722222222222 | 6 | = 0.0069444444444444 |
fathoms | lines |
---|---|
1 | = 864 |
0.0011574 | = 1 |
Symbol | Definition |
---|---|
≡ | exactly equal |
≈ | approximately equal to |
= | equal to |
digits | indicates that digits repeat infinitely (e.g. 8.294 369 corresponds to 8.294 369 369 369 369 …) |