Abstract: A T-bar lockable linkage between the gunnels and forward of a marine craft limits opening of side and central storage containers. The linkage includes a pair of tubular outer arms independently pivotally connected to a center link having an extended position for connection to the mounting brackets and a shortened position for removal therefrom. A shiftable lock block slidably supported on the linkage effects rigidized coaxial alignment of the outer arms in the extended position, The lock block includes a locking hub for releasable connection with a transverse center arm for limiting opening of the storage containers. The hub carries a keyed locking device including a latch bolt that engages the cross arm assembly to unitize the assembly and prevent separation of the components.