A hydrofoil board comprising: a hydrofoil assembly; a body, the body having a deck surface configured to support a rider, and a bottom surface opposite the deck surface, the body comprising: a fore portion toward a front end of the hydrofoil board, the fore portion forming a hull and having a planing surface upon which the hydrofoil board planes atop a surface of a body of water, the planing surface forming part of the bottom surface of the body; and an aft portion toward a rear end of the hydrofoil board, the aft portion extending from the fore portion, the aft portion having an aft bottom surface forming part of the bottom surface of the body, the aft portion mounts the hydrofoil assembly on or through the aft bottom surface; wherein the deck surface is substantially even across the fore potion and the aft portion of the body; wherein the aft bottom surface and the planing surface are on uneven planes such that an aft cross-sectional thickness between the deck surface and the aft bottom surface is less than a fore cross-sectional thickness between the deck surface and the planing surface; wherein the planing surface of the fore portion terminates at a step transition disposed between the fore portion and the aft portion, wherein the step transition forms a transition surface connecting the aft bottom surface to the planing surface, the transition surface forming part of the bottom surface; wherein the step transition bridges an offset distance between the aft bottom surface and the planing surface; characterised in that the bottom surface has a bottom surface area, the bottom surface area including a fore surface area of the planing surface, an aft surface area of the aft bottom surface, and a transition surface area of the transition surface, and wherein the fore surface area is about two thirds of the bottom surface area; and wherein the bottom surface of the body includes one or more channels (1302a, 1302b, 1302c), the one or more channels (1302a-c) communicating between the fore portion and the aft portion through the step transition. a hydrofoil assembly; a body, the body having a deck surface configured to support a rider, and a bottom surface opposite the deck surface, the body comprising: a fore portion toward a front end of the hydrofoil board, the fore portion forming a hull and having a planing surface upon which the hydrofoil board planes atop a surface of a body of water, the planing surface forming part of the bottom surface of the body; and an aft portion toward a rear end of the hydrofoil board, the aft portion extending from the fore portion, the aft portion having an aft bottom surface forming part of the bottom surface of the body, the aft portion mounts the hydrofoil assembly on or through the aft bottom surface; a fore portion toward a front end of the hydrofoil board, the fore portion forming a hull and having a planing surface upon which the hydrofoil board planes atop a surface of a body of water, the planing surface forming part of the bottom surface of the body; and an aft portion toward a rear end of the hydrofoil board, the aft portion extending from the fore portion, the aft portion having an aft bottom surface forming part of the bottom surface of the body, the aft portion mounts the hydrofoil assembly on or through the aft bottom surface; wherein the deck surface is substantially even across the fore potion and the aft portion of the body; wherein the aft bottom surface and the planing surface are on uneven planes such that an aft cross-sectional thickness between the deck surface and the aft bottom surface is less than a fore cross-sectional thickness between the deck surface and the planing surface; wherein the planing surface of the fore portion terminates at a step transition disposed between the fore portion and the aft portion, wherein the step transition forms a transition surface connecting the aft bottom surface to the planing surface, the transition surface forming part of the bottom surface; wherein the step transition bridges an offset distance between the aft bottom surface and the planing surface; characterised in that the bottom surface has a bottom surface area, the bottom surface area including a fore surface area of the planing surface, an aft surface area of the aft bottom surface, and a transition surface area of the transition surface, and wherein the fore surface area is about two thirds of the bottom surface area; and wherein the bottom surface of the body includes one or more channels (1302a, 1302b, 1302c), the one or more channels (1302a-c) communicating between the fore portion and the aft portion through the step transition.