A confined-space davit, comprising: a vertical, elongate mast provided by at least one monolithic annular extruded aluminum tube; 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, of the mast, and of the tube; wherein the tube comprises a forward wall and an opposing rearward wall, and comprises left and right opposing lateral sidewalls (131, 141) that each connect the forward wall to the rearward wall; characterized in that the tube comprises a forward-rearward extent, along the forward-rearward axis of the davit, the mast, and the tube, that is greater than a lateral width of the tube by a factor of at least 1.10; and the forward and rearward walls (111, 121) of the tube each exhibit a maximum wall thickness that is greater than a maximum wall thickness of each lateral sidewall (131, 141), by a factor of at least 1.10; and, in that at least some radially outerwardmost portions of a forward surface of the forward wall of the tube collectively define a forward arc and wherein at least some radially outerwardmost portions of a rearward surface of the rearward wall of the tube collectively define a rearward arc, and wherein the forward and rearward arcs both lie on a common circle with a common center and a common radius of curvature, the common circle falling outside at least some portion of a radially outward major surface of the left lateral sidewall of the tube and outside at least some portion of a radially outward major surface of the right lateral sidewall of the tube. a vertical, elongate mast provided by at least one monolithic annular extruded aluminum tube; 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, of the mast, and of the tube; wherein the tube comprises a forward wall and an opposing rearward wall, and comprises left and right opposing lateral sidewalls (131, 141) that each connect the forward wall to the rearward wall; characterized in that the tube comprises a forward-rearward extent, along the forward-rearward axis of the davit, the mast, and the tube, that is greater than a lateral width of the tube by a factor of at least 1.10; and the forward and rearward walls (111, 121) of the tube each exhibit a maximum wall thickness that is greater than a maximum wall thickness of each lateral sidewall (131, 141), by a factor of at least 1.10; and, in that at least some radially outerwardmost portions of a forward surface of the forward wall of the tube collectively define a forward arc and wherein at least some radially outerwardmost portions of a rearward surface of the rearward wall of the tube collectively define a rearward arc, and wherein the forward and rearward arcs both lie on a common circle with a common center and a common radius of curvature, the common circle falling outside at least some portion of a radially outward major surface of the left lateral sidewall of the tube and outside at least some portion of a radially outward major surface of the right lateral sidewall of the tube. wherein the tube comprises a forward wall and an opposing rearward wall, and comprises left and right opposing lateral sidewalls (131, 141) that each connect the forward wall to the rearward wall; characterized in that the tube comprises a forward-rearward extent, along the forward-rearward axis of the davit, the mast, and the tube, that is greater than a lateral width of the tube by a factor of at least 1.10; and the forward and rearward walls (111, 121) of the tube each exhibit a maximum wall thickness that is greater than a maximum wall thickness of each lateral sidewall (131, 141), by a factor of at least 1.10; and, in that at least some radially outerwardmost portions of a forward surface of the forward wall of the tube collectively define a forward arc and wherein at least some radially outerwardmost portions of a rearward surface of the rearward wall of the tube collectively define a rearward arc, and wherein the forward and rearward arcs both lie on a common circle with a common center and a common radius of curvature, the common circle falling outside at least some portion of a radially outward major surface of the left lateral sidewall of the tube and outside at least some portion of a radially outward major surface of the right lateral sidewall of the tube.