Confined-space davit

A confined-space davit, comprising:

• a vertical, elongate mast and a boom that is pivotally connected to an upper end portion of the mast and that extends forwardly from the mast to define a common forward-rearward axis of the davit and of the mast,
• wherein the davit further comprises a gusset strut with a rearward end that is pivotally connected to the upper end portion of the mast at a location below the pivotal connection of the boom to the upper end portion of the mast, and with a forward end that is pivotally connected to the boom,
• wherein the gusset strut comprises a forward section and a rearward section, the forward and rearward sections of the gusset strut being telescopically movable relative to each other to lengthen or shorten the gusset strut to change a vertical component of an angle at which the boom extends forwardly from the mast,
• wherein a lowermost end of the mast is configured to fit within an upwardly-open-ended cavity defined within radially-inwardmost walls of a support base so that the mast and the boom connected to the upper end portion thereof can be rotated relative to the support base around a rotation axis that coincides with the vertical axis of the mast and with a long axis of the mast,
• wherein when the mast is viewed along its long axis, the mast exhibits a cross-sectional shape that is generally annular and that completely circumferentially surrounds an interior space defined within the mast, along at least 80% of an elongate length of the mast,
• and,
• wherein the davit is configured so that the boom comprises a forward section and a rearward section with the rearward section of the boom being disconnectably, pivotally connected to the upper end portion of the mast, and with the davit being configured so that the forward and rearward sections of the gusset strut are disconnectable from each other,
• so that the davit is configured to be reversibly disassemblable into at least a first piece comprising the upper end portion of the mast with the rearward section of the gusset strut pivotally connected thereto;
• and, a second piece comprising the forward and rearward sections of the boom with the forward section of the gusset strut pivotally connected to the rearward section of the boom.