**Exhibit 31.1**

**302 CERTIFICATION**

I, Paul B. Gridley, Chairman and Chief Executive Officer of US Shipping General Partner LLC, the general partner of U.S. Shipping Partners L.P., certify that:

|   | *1.*   | *I have reviewed this annual report on Form 10-K of U.S. Shipping   Partners L.P.;*                                                                                                                                                                                                                                                                 |
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|   | *2.*   | *Based on my knowledge, this report does not contain any untrue   statement of a material fact or omit to state a material fact necessary to   make the statements made, in light of the circumstances under which such   statements were made, not misleading with respect to the period covered by   this report;*                                |
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|   | *3.*   | *Based on my knowledge, the financial statements, and other financial   information included in this report, fairly present in all material respects   the financial condition, results of operations and cash flows of the   registrant as of, and for, the periods presented in this report;*                                                     |
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|   | *4.*   | *The registrant’s other certifying officer and I are responsible for   establishing and maintaining disclosure controls and procedures (as defined   in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over   financial reporting (as defined in Exchange Act Rules 13a-15(f) and   15d-15(f)) for the registrant and have:* |
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|   |   | (a)                                                                                                                                                                                                                                                                                                                                                 | Designed   such disclosure controls and procedures, or caused such disclosure controls   and procedures to be designed under our supervision, to ensure that material   information relating to the registrant, including its consolidated   subsidiaries, is made known to us by others within those entities,   particularly during the period in which this report is being prepared; |
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|   |   | (b)                                                                                                                                                                                                                                                                                                                                                 | Designed   such internal control over financial reporting, or caused such internal   control over financial reporting to be designed under our supervision, to   provide reasonable assurance regarding the reliability of financial reporting   and the preparation of financial statements for external purposes in   accordance with generally accepted accounting principles; |
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|   |   | (c)                                                                                                                                                                                                                                                                                                                                                 | Evaluated   the effectiveness of the registrant’s disclosure controls and procedures and   presented in this report our conclusions about the effectiveness of the   disclosure controls and procedures, as of the end of the period covered by   this report based on such evaluation; and |
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|   |   | (d)                                                                                                                                                                                                                                                                                                                                                 | Disclosed in   this report any change in the registrant’s internal control over financial   reporting that occurred during the registrant’s fourth fiscal quarter that   has materially affected, or is reasonably likely to materially affect, the   registrant’s internal control over financial reporting; and |
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|   | *5.*   | *The registrant’s other certifying officer and I have disclosed, based   on our most recent evaluation of internal control over financial reporting,   to the registrant’s auditors and the audit committee of the registrant’s board   of directors:*                                                                               |
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|   |   | (a)                                                                                                                                                                                                                                                                                                                                                 | All   significant deficiencies and material weaknesses in the design or operation   of internal control over financial reporting which are reasonably likely to   adversely affect the registrant’s ability to record, process, summarize and   report financial information; and |
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|   |   | (b)                                                                                                                                                                                                                                                                                                                                                 | Any fraud,   whether or not material, that involves management or other employees who have   a significant role in the registrant’s internal control over financial   reporting. |

Date:  March 16, 2007

|   | /s/ Paul B.   Gridley               |
|--------|-------------------------------------|
|   |                                     |
|   | Paul B. Gridley                     |
|   | Chairman, Chief Executive   Officer |