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A protective shelter including an enclosure having at least a floor, at least one sidewall coupled to the floor, a door, and a roof coupled to the at least one sidewall. The protective shelter further includes one or more members coupled to the enclosure that support the protective shelter on a subs

A protective shelter including an enclosure having at least a floor, at least one sidewall coupled to the floor, a door, and a roof coupled to the at least one sidewall. The protective shelter further includes one or more members coupled to the enclosure that support the protective shelter on a substrate and a resilient grouser attached to at least one of the one or more members and in contact with the substrate.

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1. A protective shelter, comprising: an enclosure having at least a floor, at least one sidewall coupled to the floor, a doorway through the at least one sidewall, and a roof coupled to the at least one sidewall, wherein the protective shelter has a first axis and an orthogonal second axis both para

1. A protective shelter, comprising: an enclosure having at least a floor, at least one sidewall coupled to the floor, a doorway through the at least one sidewall, and a roof coupled to the at least one sidewall, wherein the protective shelter has a first axis and an orthogonal second axis both parallel to a plane including the floor of the enclosure, and wherein the protective shelter has a greater first dimension along the first axis and a lesser second dimension along the second axis;a first deck section extending from a first end of the enclosure along the first axis;a ballast disposed in the first deck section;one or more members coupled to the enclosure that support the protective shelter on a substrate; anda resilient grouser in contact with at least one of the one or more members and in contact with the substrate, wherein the resilient grouser increases an effective coefficient of friction of the protective shelter with respect to the substrate. 2. The protective shelter of claim 1, wherein the enclosure comprises metal plate. 3. The protective shelter of claim 1, wherein the roof has at least one edge region having a decreasing height at points further from a central axis of the enclosure. 4. The protective shelter of claim 1, and further comprising at least one ground anchor coupling the protective shelter to the substrate. 5. The protective shelter of claim 1, wherein the one or more members include multiple rails. 6. A protective shelter, comprising: an enclosure having at least a floor, at least one sidewall coupled to the floor, a doorway through the at least one sidewall, and a roof coupled to the at least one sidewall, wherein:the protective shelter and the substrate bound a substantially enclosed sub-floor region; the roof includes an aperture located proximate a point of low static air pressure during a high-velocity wind event; andthe protective shelter further includes an air duct providing airflow communication between the substantially enclosed sub-floor region and an exterior region of the enclosure via the aperture;one or more members coupled to the enclosure that support the protective shelter on a substrate; anda resilient grouser in contact with at least one of the one or more members and in contact with the substrate. 7. The protective shelter of claim 6, wherein: the enclosure has an interior volume; andthe air duct extends through the interior volume of the enclosure. 8. The protective shelter of claim 6, and further comprising a structure coupled to an exterior of the enclosure that increases wind velocity adjacent the aperture. 9. The protective shelter of claim 1, and further comprising a ballast. 10. The protective shelter of claim 9, wherein: the protective shelter includes a subfloor that is spaced from the floor; anda ballast is disposed between the subfloor and the floor. 11. The protective shelter of claim 9, wherein the ballast includes concrete. 12. The protective shelter of claim 1, and further including a second deck section extending from a second end of the enclosure along the first axis. 13. The protective shelter of claim 12, and further comprising ballast disposed in the second deck section. 14. The protective shelter of claim 1, wherein the doorway is disposed at the first end of the enclosure. 15. The protective shelter of claim 1, wherein the one or more members include multiple rails extending along the first axis. 16. The protective shelter of claim 1, wherein the ballast includes concrete. 17. The protective shelter of claim 1, wherein the at least one sidewall comprises a substantially cylindrical sidewall. 18. An assembly, comprising: protective shelter in accordance with claim 1; anda transport bearing the protective shelter. 19. The protective shelter of claim 1, wherein the grouser is formed of a material selected from a set including rubber, foam and polymer. 20. The protective shelter of claim 1, wherein the effective coefficient of friction is at least 1.0. 21. A method of deploying a protective shelter, said method comprising: transporting, to an installation site having a substrate, a protective shelter including: an enclosure having at least a floor, at least one sidewall coupled to the floor, a doorway through the at least one sidewall, and a roof coupled to the at least one sidewall, wherein the protective shelter has a first axis and an orthogonal second axis both parallel to a plane including the floor of the enclosure, and wherein the protective shelter has a greater first dimension along the first axis and a lesser second dimension along the second axis;a first deck section extending from a first end of the enclosure along the first axis;ballast disposed in the first deck section;one or more members coupled to the enclosure that support the protective shelter on a substrate; andplacing the protective shelter on the substrate with a resilient grouser in contact with at least one of the one or more members and in contact with the substrate, such that the resilient grouser increases an effective coefficient of friction of the protective shelter with respect to the substrate. 22. The method of claim 21, wherein the grouser is formed of a material selected from a set including rubber, foam and polymer. 23. The method of claim 21, wherein the effective coefficient of friction is at least 1.0. 24. An assembly, comprising: protective shelter in accordance with claim 6; anda transport bearing the protective shelter. 25. The protective shelter of claim 6, wherein the grouser is formed of a material selected from a set including rubber, foam and polymer. 26. The protective shelter of claim 6, wherein the resilient grouser increases an effective coefficient of friction of the protective shelter with respect to the substrate to at least 1.0. 27. A method of deploying a protective shelter, said method comprising: transporting, to an installation site having a substrate, a protective shelter including: an enclosure including at least a floor, at least one sidewall coupled to the floor, a doorway through the at least one sidewall, and a roof coupled to the at least one sidewall, wherein: the protective shelter and the substrate bound a substantially enclosed sub-floor region;the roof includes an aperture located proximate a point of low static air pressure during a high-velocity wind event; andthe protective shelter further includes an air duct providing airflow communication between the substantially enclosed sub-floor region and an exterior region of the enclosure via the aperture;one or more members coupled to the enclosure that support the protective shelter on a substrate;placing the protective shelter on the substrate with a resilient grouser in contact with at least one of the one or more members and in contact with the substrate. 28. The method of claim 27, wherein the grouser is formed of a material selected from a set including rubber, foam and polymer. 29. The method of claim 27, wherein the resilient grouser increases an effective coefficient of friction of the protective shelter with respect to the substrate to at least 1.0. 30. A protective shelter, comprising: an enclosure having at least a floor, at least one sidewall coupled to the floor, a doorway through the at least one sidewall, and a roof coupled to the at least one sidewall;one or more members that support the protective shelter on a substrate; anda ballast disposed beneath the floor;wherein: the protective shelter and the substrate bound a substantially enclosed sub-floor region;the roof includes an aperture located proximate a point of low static air pressure during a high-velocity wind event;the protective shelter further includes an air duct providing airflow communication between the substantially enclosed sub-floor region and an exterior region of the enclosure via the aperture; anda resilient grouser in contact with at least one of the one or more members and in contact with the substrate. 31. An assembly, comprising: protective shelter in accordance with claim 30; anda transport bearing the protective shelter. 32. The protective shelter of claim 30, wherein the grouser is formed of a material selected from a set including rubber, foam and polymer. 33. The protective shelter of claim 30, wherein the resilient grouser increases an effective coefficient of friction of the protective shelter with respect to the substrate to at least 1.0. 34. A method of deploying a protective shelter, said method comprising: transporting, to an installation site having a substrate, a protective shelter including: an enclosure having at least a floor, at least one sidewall coupled to the floor, a doorway through the at least one sidewall, and a roof coupled to the at least one sidewall;one or more members that support the protective shelter on a substrate; anda ballast disposed beneath the floor;wherein: the protective shelter and the substrate bound a substantially enclosed sub-floor region;the roof includes an aperture located proximate a point of low static air pressure during a high-velocity wind event;the protective shelter further includes an air duct providing airflow communication between the substantially enclosed sub-floor region and an exterior region of the enclosure via the aperture; andplacing the protective shelter on the substrate with a resilient grouser in contact with at least one of the one or more members and in contact with the substrate. 35. The method of claim 34, wherein the grouser is formed of a material selected from a set including rubber, foam and polymer. 36. The method of claim 34, wherein the resilient grouser increases an effective coefficient of friction of the protective shelter with respect to the substrate to at least 1.0. 37. A protective shelter, comprising: an enclosure having at least a floor, at least one sidewall coupled to the floor, a doorway through the at least one sidewall, and a roof coupled to the at least one sidewall, wherein the protective shelter has a first axis and an orthogonal second axis both parallel to a plane including the floor of the enclosure;one or more members that support the protective shelter on a substrate;ballast disposed beneath the floor;a first deck section extending from a first end of the enclosure along the first axis;ballast disposed in the first deck section; anda resilient grouser in contact with at least one of the one or more members and in contact with the substrate. 38. An assembly, comprising: protective shelter in accordance with claim 37; anda transport bearing the protective shelter. 39. The protective shelter of claim 37, wherein the grouser is formed of a material selected from a set including rubber, foam and polymer. 40. The protective shelter of claim 37, wherein the resilient grouser increases an effective coefficient of friction of the protective shelter with respect to the substrate to at least 1.0. 41. A method of deploying a protective shelter, said method comprising: transporting, to an installation site having a substrate, a protective shelter including: an enclosure having at least a floor, at least one sidewall coupled to the floor, a doorway through the at least one sidewall, and a roof coupled to the at least one sidewall, wherein the protective shelter has a first axis and an orthogonal second axis both parallel to a plane including the floor of the enclosure;one or more members that support the protective shelter on a substrate;ballast disposed beneath the floor;a first deck section extending from a first end of the enclosure along the first axis;ballast disposed in the first deck section; andplacing the protective shelter on the substrate with a resilient grouser in contact with at least one of the one or more members and in contact with the substrate. 42. The method of claim 41, wherein the grouser is formed of a material selected from a set including rubber, foam and polymer. 43. The method of claim 41, wherein the resilient grouser increases an effective coefficient of friction of the protective shelter with respect to the substrate to at least 1.0. 44. A protective shelter, comprising: an enclosure having at least a floor, at least one sidewall coupled to the floor, a doorway through the at least one sidewall, and a roof coupled to the at least one sidewall, wherein the protective shelter has a first axis and an orthogonal second axis both parallel to a plane including the floor of the enclosure, and wherein the protective shelter has a greater first dimension along the first axis and a lesser second dimension along the second axis;multiple rails that extend along the first axis, are coupled to the enclosure, and support the protective shelter on a substrate;first and second deck sections coupled to the rails, wherein the first and second deck sections extend substantially symmetrically from the enclosure along the first axis;a ballast disposed in one or more locations in the protective shelter, including at least one location in a set including the first deck section and the second deck section; anda resilient grouser in contact with at least one of the one or more members and in contact with the substrate. 45. An assembly, comprising: protective shelter in accordance with claim 44; anda transport bearing the protective shelter. 46. The protective shelter of claim 44, wherein the grouser is formed of a material selected from a set including rubber, foam and polymer. 47. The protective shelter of claim 44, wherein the resilient grouser increases an effective coefficient of friction of the protective shelter with respect to the substrate to at least 1.0. 48. A method of deploying a protective shelter, said method comprising: transporting, to an installation site having a substrate, a protective shelter including: an enclosure having at least a floor, at least one sidewall coupled to the floor, a doorway through the at least one sidewall, and a roof coupled to the at least one sidewall, wherein the protective shelter has a first axis and an orthogonal second axis both parallel to a plane including the floor of the enclosure, and wherein the protective shelter has a greater first dimension along the first axis and a lesser second dimension along the second axis;multiple rails that extend along the first axis, are coupled to the enclosure, and support the protective shelter on a substrate;first and second deck sections coupled to the rails, wherein the first and second deck sections extend substantially symmetrically from the enclosure along the first axis;a ballast disposed in one or more locations in the protective shelter, including at least one location in a set including the first deck section and the second deck section; andplacing the protective shelter on the substrate with a resilient grouser in contact with at least one of the one or more members and in contact with the substrate. 49. The method of claim 48, wherein the grouser is formed of a material selected from a set including rubber, foam and polymer. 50. The method of claim 48, wherein the resilient grouser increases an effective coefficient of friction of the protective shelter with respect to the substrate to at least 1.0. 51. A protective shelter, comprising: an enclosure having at least a floor, at least one sidewall coupled to the floor, a doorway through the at least one sidewall, and a roof coupled to the at least one sidewall; wherein the protective shelter has a first axis and an orthogonal second axis both parallel to a plane including the floor of the enclosure;multiple members that elevate the floor above a substrate;first and second deck sections supported by the multiple members, wherein the protective shelter has a greater first dimension along the first axis and a lesser second dimension along the second axis and the first and second deck sections extend substantially symmetrically from the enclosure along the first axis;wherein: the protective shelter and the substrate bound a substantially enclosed sub-floor region;the roof includes an aperture located proximate a point of low static air pressure during a high-velocity wind event;the protective shelter further includes an air duct providing airflow communication between the substantially enclosed sub-floor region and an exterior region of the enclosure via the aperture; anda resilient grouser in contact with at least one of the one or more members and in contact with the substrate. 52. An assembly, comprising: protective shelter in accordance with claim 51; anda transport bearing the protective shelter. 53. The protective shelter of claim 51, wherein the grouser is formed of a material selected from a set including rubber, foam and polymer. 54. The protective shelter of claim 51, wherein the resilient grouser increases an effective coefficient of friction of the protective shelter with respect to the substrate to at least 1.0. 55. A method of deploying a protective shelter, said method comprising: transporting, to an installation site having a substrate, a protective shelter including: an enclosure having at least a floor, at least one sidewall coupled to the floor, a doorway through the at least one sidewall, and a roof coupled to the at least one sidewall;wherein the protective shelter has a first axis and an orthogonal second axis both parallel to a plane including the floor of the enclosure; multiple members that elevate the floor above a substrate;first and second deck sections supported by the multiple members, wherein the protective shelter has a greater first dimension along the first axis and a lesser second dimension along the second axis and the first and second deck sections extend substantially symmetrically from the enclosure along the first axis;wherein: the protective shelter and the substrate bound a substantially enclosed sub-floor region;the roof includes an aperture located proximate a point of low static air pressure during a high-velocity wind event;the protective shelter further includes an air duct providing airflow communication between the substantially enclosed sub-floor region and an exterior region of the enclosure via the aperture; andplacing the protective shelter on the substrate with a resilient grouser in contact with at least one of the one or more members and in contact with the substrate. 56. The method of claim 55, wherein the grouser is formed of a material selected from a set including rubber, foam and polymer. 57. The method of claim 55, wherein the resilient grouser increases an effective coefficient of friction of the protective shelter with respect to the substrate to at least 1.0. 58. A protective shelter, comprising: an enclosure having at least a floor, at least one sidewall coupled to the floor, a door, and a roof coupled to the at least one sidewall, wherein the protective shelter has a first axis and an orthogonal second axis both parallel to a plane including the floor of the enclosure, and wherein the protective shelter has a greater first dimension along the first axis and a lesser second dimension along the second axis;multiple elongate members extending along the first axis that are coupled to the enclosure and support the protective shelter on a substrate;first and second deck sections coupled to the elongate members, wherein the first and second deck sections extend substantially symmetrically from the enclosure along the first axis;a ballast disposed in one or more locations in the protective shelter, including in at least both the first deck section and the second deck section; anda resilient grouser in contact with at least one of the one or more members and in contact with the substrate. 59. The protective shelter of claim 58, wherein the at least one sidewall is substantially cylindrical. 60. The protective shelter of claim 58, wherein the ballast includes concrete. 61. An assembly, comprising: protective shelter in accordance with claim 58; anda transport bearing the protective shelter. 62. The protective shelter of claim 58, wherein the grouser is formed of a material selected from a set including rubber, foam and polymer. 63. The protective shelter of claim 58, wherein the resilient grouser increases an effective coefficient of friction of the protective shelter with respect to the substrate to at least 1.0. 64. A method, comprising: transporting, to an installation site having a substrate, a protective shelter including: an enclosure having at least a floor, at least one sidewall coupled to the floor, a door, and a roof coupled to the at least one sidewall, wherein the protective shelter has a first axis and an orthogonal second axis both parallel to a plane including the floor of the enclosure, and wherein the protective shelter has a greater first dimension along the first axis and a lesser second dimension along the second axis;multiple elongate members extending along the first axis that are coupled to the enclosure and support the protective shelter on the substrate;first and second deck sections coupled to the elongate members, wherein the first and second deck sections extend substantially symmetrically from the enclosure along the first axis; anda ballast disposed in one or more locations in the protective shelter, including in at least both the first deck section and the second deck section; andplacing the protective shelter on the substrate with a resilient grouser in contact with at least one of the one or more members and in contact with the substrate. 65. The method of claim 64, wherein the grouser is formed of a material selected from a set including rubber, foam and polymer. 66. The method of claim 64, wherein the resilient grouser increases an effective coefficient of friction of the protective shelter with respect to the substrate to at least 1.0.