Owned, co-owned or hired in: the cost of a hire

Steps

On the asset (Lease & rentals → Assets → the asset), under Ownership, choose: Owned by us, Co-owned with a partner (the partner's share of the proceeds, e.g. 40%) or Hired in from a partner (their rate an hour, e.g. 5,000), and the partner (a supplier).
On the machine's Hours & billing page, Settle the partner for a period: Navigate works it out from the approved hours - hired in: hours × the partner's rate; co-owned: the proceeds × their share (less the shared costs, if they share them) - and raises the partner's supplier invoice (posted with their invoice number, or a draft until it arrives).
Direct costs: Charge the working days for the operator and turn man - say whether they are casual (accrued) or on payroll (moved from salaries) - and add servicing, repairs and fuel for the margin.
The Margin panel: earned revenue (approved hours × the rate), less the partner and the direct costs. Invoiced, and how much of it is still in advance, are shown beside it.

Owned: the machine's purchase is not a cost of the hire - its depreciation is in the asset register. Hired in: the partner's charge is a cost of sales (third-party equipment hire); co-owned: the partner's share is a cost of sales (partners' share - co-owned equipment).
Owned and co-owned machines must be in the fixed-asset register (co-owned: at your share of the cost). A machine hired in is the partner's: add it with Add an owner's asset, not from the register - Navigate refuses to mark a register asset as hired in, or an owner's asset as owned.