| # | Title | Name | Town/City | S/C/P | Region | Comment | Date |
|---|---|---|---|---|---|---|---|
| 601 | Mr | Michael MacDonald | Revere | MA | USA | N/G | Nov 22, 2010 |
| 602 | Miss | Ma. Teresa de la Garza | Mexico, D.F. | D.F. | Mexico | N/G | Nov 22, 2010 |
| 603 | Mrs | Jacqueline Stanley | N/G | N/G | USA | N/G | Nov 22, 2010 |
| 604 | Mr | Markus Fleischmann (Pro Dive Mexico) | N/G | N/G | Mexico | N/G | Nov 22, 2010 |
| 605 | N/G | gabriela chavez | cancun | q. roo | Mexico | Hidden | Nov 22, 2010 |
| 606 | Ms | Pilar Marqués | N/G | N/G | Spain | N/G | Nov 22, 2010 |
| 607 | Mr | Jesse Cancelmo | N/G | N/G | USA | N/G | Nov 22, 2010 |
| 608 | Ms | GABRIELE DRECHSLER | BERLIN | N/G | Germany | N/G | Nov 22, 2010 |
| 609 | N/G | Lizette Parra Lara | Cancún | Quintana Roo | Mexico | Hidden | Nov 22, 2010 |
| 610 | Ms | Deborah Flanagan | Austin | TX | USA | N/G | Nov 22, 2010 |
| 611 | Ms | Peggy Schott | Berlin | N/G | Germany | N/G | Nov 22, 2010 |
| 612 | ms | susana portela | madrid | N/G | Spain | View | Nov 22, 2010 |
| 613 | Mrs | rossana artioli | N/G | N/G | Italy | N/G | Nov 22, 2010 |
| 614 | N/G | Lynne Davies | N/G | N/G | UK | N/G | Nov 22, 2010 |
| 615 | mr | hautbout damien | fvd | vdf | Aruba | View | Nov 22, 2010 |
| 616 | mr | fezr damien | fvd | vdf | Aruba | View | Nov 22, 2010 |
| 617 | mr | dsfg damien | fvd | vdf | Aruba | View | Nov 22, 2010 |
| 618 | Mr | Huub Moonen | N/G | N/G | Mexico | View | Nov 22, 2010 |
| 619 | N/G | Russ Osborne | N/G | N/G | Canada | N/G | Nov 22, 2010 |
| 620 | MS | Hilda Escalante | Oxnard | California | USA | N/G | Nov 22, 2010 |
| 621 | Sr | Roberto De Anda | N/G | N/G | Mexico | N/G | Nov 22, 2010 |
| 622 | Ms | Laura Cornish | louisville | colorado | USA | N/G | Nov 22, 2010 |
| 623 | N/G | Luciano Defeo | Playa del Carmen | Q.Roo | Mexico | N/G | Nov 22, 2010 |
| 624 | Ms | Borde Anne Sophie | N/G | N/G | France | N/G | Nov 22, 2010 |
| 625 | N/G | Sylvia Foster | playa del carmen | N/G | Mexico | View | Nov 22, 2010 |
| 626 | N/G | Myrna Cleghorn | N/G | Cozumel | Mexico | N/G | Nov 22, 2010 |
| 627 | Mrs | Mary Grigel | Calgary | Alberta | Canada | N/G | Nov 22, 2010 |
| 628 | ms | nadia venturini | perugia | italy | Italy | N/G | Nov 22, 2010 |
| 629 | N/G | Pamela Newlove | N/G | N/G | Canada | N/G | Nov 22, 2010 |
| 630 | Mr. | Yamil Ortiz de Ora | N/G | N/G | Mexico | N/G | Nov 22, 2010 |
| 631 | Mr. | John Robarts | N/G | N/G | Canada | N/G | Nov 22, 2010 |
| 632 | N/G | JORGE SALZBERG | N/G | N/G | Brazil | N/G | Nov 22, 2010 |
| 633 | N/G | Anonymous | N/G | N/G | USA | N/G | Nov 22, 2010 |
| 634 | N/G | Said Orozco Tapia | cozumel | quintana roo | Mexico | N/G | Nov 22, 2010 |
| 635 | N/G | Anonymous | merida | N/G | Mexico | N/G | Nov 22, 2010 |
| 636 | Mr. | Kelley A. Clowe | N/G | N/G | USA | N/G | Nov 22, 2010 |
| 637 | N/G | jesus perez tarrero | N/G | N/G | Spain | N/G | Nov 22, 2010 |
| 638 | Mr | victor moreno | varacruz | veracruz | Mexico | N/G | Nov 22, 2010 |
| 639 | N/G | Anonymous | Pueblo | CO | USA | N/G | Nov 22, 2010 |
| 640 | N/G | Derek Emmett | N/G | N/G | USA | N/G | Nov 22, 2010 |
| 641 | Mr | Brian David | N/G | N/G | USA | N/G | Nov 22, 2010 |
| 642 | mr | greg sparks | N/G | N/G | USA | View | Nov 22, 2010 |
| 643 | Mrs. | Anonymous | N/G | N/G | Mexico | View | Nov 22, 2010 |
| 644 | N/G | Beth Dardynski | San Miguel | Cozumel, Quintana Roo | Mexico | N/G | Nov 22, 2010 |
| 645 | Ms | Andrea Sekula | N/G | N/G | Mexico | View | Nov 22, 2010 |
| 646 | Ms | Laura Diaz | N/G | N/G | USA | N/G | Nov 22, 2010 |
| 647 | mr | Gerardo Portocarret | cozumel | qroo. | Mexico | N/G | Nov 22, 2010 |
| 648 | mr | ramon magaña | playa del carmen q.roo | playa del carmen | Mexico | N/G | Nov 22, 2010 |
| 649 | N/G | Ruy Perez Toledo | N/G | N/G | Sweden | N/G | Nov 22, 2010 |
| 650 | mr | marco bortignon | N/G | N/G | Mexico | View | Nov 22, 2010 |
- S/C/P - State, County or Province
- Dates displayed in the signature list are based on UTC/GMT
- Anonymous signatures signify people who have chosen not to display their names publicly
- A comment in gray indicates that the signer has hidden their comment from public view