| cable length (US) | 1 cable length (US) | 2 cable length (US) | 3 cable length (US) | 4 cable length (US) | 5 cable length (US) | 6 cable length (US) | 7 cable length (US) | 8 cable length (US) | 9 cable length (US) | 10 cable length (US) | 11 cable length (US) | 12 cable length (US) | 13 cable length (US) | 14 cable length (US) | 15 cable length (US) | 16 cable length (US) | 17 cable length (US) | 18 cable length (US) | 19 cable length (US) | 20 cable length (US) | 21 cable length (US) | 22 cable length (US) | 23 cable length (US) | 24 cable length (US) | 25 cable length (US) | 26 cable length (US) | 27 cable length (US) | 28 cable length (US) | 29 cable length (US) | 30 cable length (US) | 31 cable length (US) | 32 cable length (US) | 33 cable length (US) | 34 cable length (US) | 35 cable length (US) | 36 cable length (US) | 37 cable length (US) | 38 cable length (US) | 39 cable length (US) | 40 cable length (US) | 41 cable length (US) | 42 cable length (US) | 43 cable length (US) | 44 cable length (US) | 45 cable length (US) | 46 cable length (US) | 47 cable length (US) | 48 cable length (US) | 49 cable length (US) | 50 cable length (US) | 51 cable length (US) | 52 cable length (US) | 53 cable length (US) | 54 cable length (US) | 55 cable length (US) | 56 cable length (US) | 57 cable length (US) | 58 cable length (US) | 59 cable length (US) | 60 cable length (US) | 61 cable length (US) | 62 cable length (US) | 63 cable length (US) | 64 cable length (US) | 65 cable length (US) | 66 cable length (US) | 67 cable length (US) | 68 cable length (US) | 69 cable length (US) | 70 cable length (US) | 71 cable length (US) | 72 cable length (US) | 73 cable length (US) | 74 cable length (US) | 75 cable length (US) | 76 cable length (US) | 77 cable length (US) | 78 cable length (US) | 79 cable length (US) | 80 cable length (US) | 81 cable length (US) | 82 cable length (US) | 83 cable length (US) | 84 cable length (US) | 85 cable length (US) | 86 cable length (US) | 87 cable length (US) | 88 cable length (US) | 89 cable length (US) | 90 cable length (US) | 91 cable length (US) | 92 cable length (US) | 93 cable length (US) | 94 cable length (US) | 95 cable length (US) | 96 cable length (US) | 97 cable length (US) | 98 cable length (US) | 99 cable length (US) | 100 cable length (US) |
| spat | 2.19456 × 10-10 S | 4.38912 × 10-10 S | 6.58368 × 10-10 S | 8.77824 × 10-10 S | 1.09728 × 10-9 S | 1.316736 × 10-9 S | 1.536192 × 10-9 S | 1.755648 × 10-9 S | 1.975104 × 10-9 S | 2.19456 × 10-9 S | 2.414016 × 10-9 S | 2.633472 × 10-9 S | 2.852928 × 10-9 S | 3.072384 × 10-9 S | 3.29184 × 10-9 S | 3.511296 × 10-9 S | 3.730752 × 10-9 S | 3.950208 × 10-9 S | 4.169664 × 10-9 S | 4.38912 × 10-9 S | 4.608576 × 10-9 S | 4.828032 × 10-9 S | 5.047488 × 10-9 S | 5.266944 × 10-9 S | 5.4864 × 10-9 S | 5.705856 × 10-9 S | 5.925312 × 10-9 S | 6.144768 × 10-9 S | 6.364224 × 10-9 S | 6.58368 × 10-9 S | 6.803136 × 10-9 S | 7.022592 × 10-9 S | 7.242048 × 10-9 S | 7.461504 × 10-9 S | 7.68096 × 10-9 S | 7.900416 × 10-9 S | 8.119872 × 10-9 S | 8.339328 × 10-9 S | 8.558784 × 10-9 S | 8.77824 × 10-9 S | 8.997696 × 10-9 S | 9.217152 × 10-9 S | 9.436608 × 10-9 S | 9.656064 × 10-9 S | 9.87552 × 10-9 S | 1.0094976 × 10-8 S | 1.0314432 × 10-8 S | 1.0533888 × 10-8 S | 1.0753344 × 10-8 S | 1.09728 × 10-8 S | 1.1192256 × 10-8 S | 1.1411712 × 10-8 S | 1.1631168 × 10-8 S | 1.1850624 × 10-8 S | 1.207008 × 10-8 S | 1.2289536 × 10-8 S | 1.2508992 × 10-8 S | 1.2728448 × 10-8 S | 1.2947904 × 10-8 S | 1.316736 × 10-8 S | 1.3386816 × 10-8 S | 1.3606272 × 10-8 S | 1.3825728 × 10-8 S | 1.4045184 × 10-8 S | 1.426464 × 10-8 S | 1.4484096 × 10-8 S | 1.4703552 × 10-8 S | 1.4923008 × 10-8 S | 1.5142464 × 10-8 S | 1.536192 × 10-8 S | 1.5581376 × 10-8 S | 1.5800832 × 10-8 S | 1.6020288 × 10-8 S | 1.6239744 × 10-8 S | 1.64592 × 10-8 S | 1.6678656 × 10-8 S | 1.6898112 × 10-8 S | 1.7117568 × 10-8 S | 1.7337024 × 10-8 S | 1.755648 × 10-8 S | 1.7775936 × 10-8 S | 1.7995392 × 10-8 S | 1.8214848 × 10-8 S | 1.8434304 × 10-8 S | 1.865376 × 10-8 S | 1.8873216 × 10-8 S | 1.9092672 × 10-8 S | 1.9312128 × 10-8 S | 1.9531584 × 10-8 S | 1.975104 × 10-8 S | 1.9970496 × 10-8 S | 2.0189952 × 10-8 S | 2.0409408 × 10-8 S | 2.0628864 × 10-8 S | 2.084832 × 10-8 S | 2.1067776 × 10-8 S | 2.1287232 × 10-8 S | 2.1506688 × 10-8 S | 2.1726144 × 10-8 S | 2.19456 × 10-8 S |
A cable length or length of cable is a nautical unit of measure equal to one tenth of a nautical mile or approximately 100 fathoms. The unit is named after the length of a ship's anchor cable in the Age of Sail. The definition varies:
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| cable length (US) | ≡ 720 ft | = 219.456 m | Imperial/US |
| cable length (US) | spats | cable length (US) | spats |
|---|---|---|---|
| 1 | = 2.19456E-10 | 4 | = 8.77824E-10 |
| 1.5 | = 3.29184E-10 | 4.5 | = 9.87552E-10 |
| 2 | = 4.38912E-10 | 5 | = 1.09728E-9 |
| 2.5 | = 5.4864E-10 | 5.5 | = 1.207008E-9 |
| 3 | = 6.58368E-10 | 6 | = 1.316736E-9 |
The spat (symbol S) is also an obsolete unit of distance used in astronomy. It is equal to 1000000000 kilometres (1 Tm or 1012 m). It is about 6.6846 astronomical units (AU), 1.057×10−4 light-years or3.240×10−5 parsecs.
| Name of unit | Symbol | Definition | Relation to SI units | Unit System |
|---|---|---|---|---|
| spat | S | ≡ 1×1012 m | ≡ 1×1012 m | Science - Astronomy (Length) |
| spats | cable length (US) | spats | cable length (US) |
|---|---|---|---|
| 1 | = 4556722076.4071 | 4 | = 18226888305.628 |
| 1.5 | = 6835083114.6107 | 4.5 | = 20505249343.832 |
| 2 | = 9113444152.8142 | 5 | = 22783610382.036 |
| 2.5 | = 11391805191.018 | 5.5 | = 25061971420.239 |
| 3 | = 13670166229.221 | 6 | = 27340332458.443 |
| cable length (US) | spats |
|---|---|
| 1 | = 2.19456 × 10-10 |
| 4,556,722,076.4071 | = 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 …) |