Acronym	giship
TOCID symbol	(7/3)P
Name	tristrophic heptagrammic prism, heptagrammic prism of winding number 3, great heptagrammic prism, great stellated heptagonal prism
	©
Circumradius	sqrt[1+1/sin2(3π/7)]/2 = 0.716257
Vertex figure	[42,7/3]
Dihedral angles	between {4} and {4}:   180° 1/7 = 25.714286° 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 giship is isomorphic to hep, thereby replacing convex heptagrams with winding number 3 by heptagons. – It likewise is isomorphic to ship, thereby replacing convex heptagrams with winding number 3 by heptagrams with winding number 2.

Incidence matrix according to Dynkin symbol

x x7/3o

. .   . | 14 | 1  2 | 2 1
--------+----+------+----
x .   . |  2 | 7  * | 2 0
. x   . |  2 | * 14 | 1 1
--------+----+------+----
x x   . |  4 | 2  2 | 7 *
. x7/3o |  7 | 0  7 | * 2