Acronym	ship
TOCID symbol	(7/2)P
Name	bistrophic heptagrammic prism, heptagrammic prism of winding number 2, small heptagrammic prism, small stellated heptagonal prism
	©
Circumradius	sqrt[1+1/sin2(2π/7)]/2 = 0.811783
Vertex figure	[42,7/2]
Dihedral angles	between {4} and {4}:   180° 3/7 = 77.142857° between {4} and {7}:   90°
Face vector	14, 21, 9
Confer	general prisms: n/d-p   general polytopal classes: segmentohedra
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As abstract polytop ship is isomorphic to hep, thereby replacing convex heptagrams with winding number 2 by heptagons. – It likewise is isomorphic to giship, thereby replacing convex heptagrams with winding number 2 by heptagrams with winding number 3.

Incidence matrix according to Dynkin symbol

x x7/2o

. .   . | 14 | 1  2 | 2 1
--------+----+------+----
x .   . |  2 | 7  * | 2 0
. x   . |  2 | * 14 | 1 1
--------+----+------+----
x x   . |  4 | 2  2 | 7 *
. x7/2o |  7 | 0  7 | * 2