Exhibit12.1

GLOBAL SIGNAL INC.COMPUTATION OR RATIO OF EARNINGS TOCOMBINED FIXED CHARGES AND PREFERRED SHAREDIVIDENDS

(unaudited)

|                                                                          |  |                           |         |                          |  |           |         |           |  |        |         |         |  |        |         |         |  |  |
|--------------------------------------------------------------------------|--|---------------------------|---------|--------------------------|--|-----------|---------|-----------|--|--------|---------|---------|--|--------|---------|---------|--|--|
|                                                                     |  | For the Three MonthsEnded |         | For the Six Months Ended |
|                                                                     |  | 6/30/2004                 |         | 6/30/2005                |  | 6/30/2004 |         | 6/30/2005 |
| Earnings                                                                 |  |
| Pre-tax income(loss) from continuing operations before minority interest |  | $                         | 4,358   |                     |  | $         | (9,444  | )    |  | $      | (2,538  | )  |  | $      | (5,879  | )  |
| Add: Fixed charges                                                       |  |                      | 9,743   |                     |  |      | 24,270  |      |  |   | 18,743  |    |  |   | 39,909  |    |
| Less: Capitalizedinterest                                                |  |                      | 15      |                     |  |      | 108     |      |  |   | 28      |    |  |   | 125     |    |
| Totalearnings                                                            |  | $                         | 14,086  |                     |  | $         | 14,718  |      |  | $      | 16,177  |    |  | $      | 33,905  |    |
| FixedCharges                                                             |  |
| Interest expense (1)                                                     |  | $                         | 5,482   |                     |  | $         | 14,607  |      |  | $      | 10,370  |    |  | $      | 25,243  |    |
| Capitalized interest                                                     |  |                      | 15      |                     |  |      | 108     |      |  |   | 28      |    |  |   | 125     |    |
| Interest factor in rentexpense                                           |  |                      | 2,840   |                     |  |      | 7,385   |      |  |   | 5,714   |    |  |   | 10,807  |    |
| Amortization of deferred debtcosts                                       |  |                      | 1,406   |                     |  |      | 2,170   |      |  |   | 2,631   |    |  |   | 3,734   |    |
| Totalfixed charges                                                       |  | $                         | 9,743   |                     |  | $         | 24,270  |      |  | $      | 18,743  |    |  | $      | 39,909  |    |
| Preferred stock dividend requirements(2)                                 |  | $                         | — |                     |  | $         | — |      |  | $      | — |    |  | $      | — |    |
| Combined fixedcharges and preferred stock dividiend                      |  | $                         | 9,743   |                     |  | $         | 24,270  |      |  | $      | 18,743  |    |  | $      | 39,909  |    |
| Ratio of earnings to fixed charges (3)                                   |  |                      | 1.45    |                     |  |      | 0.61    |      |  |   | 0.86    |    |  |   | 0.85    |    |
| Ratio ofearnings to combined fixed charges and preferred stockdividends  |  |                      | 1.45    |                     |  |      | 0.61    |      |  |   | 0.86    |    |  |   | 0.85    |    |
|                                                                          |

|  |                                                                              |
|--|------------------------------------------------------------------------------|
|  | (1) Interest expense includesderivative amortization and fair value changes. |

|  |                                                                                       |
|--|---------------------------------------------------------------------------------------|
|  | (2) Wedid not have any preferred capital outstanding for any of the periodspresented. |

|  |                                                                                                                                                                                                                           |
|--|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
|  | (3) The shortfall of earnings to combinedfixed charges for the three months ended June 30, 2005 and the sixmonths ended June 30, 2004 and 2005 was approximately $9.6 million,$2.6 million and $6.0 million,respectively. |

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