Abstract: An alignment structure for a battery pack and a propulsion module for a powered watercraft. The alignment structure is configured to be received in and affixed to a powered watercraft. The alignment structure includes a first alignment feature configured to receive a removable battery pack and a second alignment feature configured to receive a removable propulsion module for propelling the powered watercraft in a longitudinal direction. The alignment structure extends along the longitudinal direction to provide a space for receiving the battery pack and/or the propulsion module. The first alignment feature and the second alignment feature are together configured for positioning and fixedly locating a battery pack and a propulsion module relative to each other so that the battery pack and the propulsion module having been received in the alignment structure are individually removable.

Abstract: A backpack has a casing surrounding a space with the casing having a front wall which is intended to be facing the back of a carrier and is a flexible wall directly adjoining the space. The casing also has a dimensionally stable shell extending from the front wall, which together with the front wall surrounds the space.