Abstract: There is provided a seal assembly comprising: a first component and a second component spaced apart from the first component so as to define a passage for the transfer of fluid from an inlet of the seal assembly to an outlet of the seal assembly, wherein the first component comprises a concavity at least partially defining the passage, and wherein no part of the second component extends into the portion of the passage bounded by the concavity.

Abstract: Disclosed herein is a fuel oil composition comprising a renewable fuel or a blend of petroleum based fuels with renewable fuels, also containing an additives composition to enhance the base and combined fuel's resistance to forming insoluble particulates upon storage at diminished operating temperatures. Further described is the additive package used to inhibit particulate formation.

Abstract: A method is disclosed of controlling a ground engineering apparatus including an elongate member for creating a bore at a predetermined position and orientation. The method includes receiving a plurality of positional information signals relating to the apparatus, processing the positional information signals to generate positional data including a representation of the position and orientation of the elongate member relative to the predetermined position and orientation of the bore; and outputting a control signal for aligning the elongate member with the predetermined position and orientation of the bore. A ground engineering apparatus, computer apparatus, drilling rig and piling rig are also disclosed.