The mishap squadron has two duties to attend to immediately. Both have precedence over AMB activity. Stand clear of squadron executive, admin or ops personnel performing these essential duties. Whether interim senior member awaiting relief or externally appointed senior member, the first on scene is the senior member for the purpose of this discussion of immediate response. He must not delay proceeding out of indecision or concern about what a relief might want.
Some evidence is perishable and best gathered fresh.
Do not wait for someone whose arrival may be indefinite. First things first. You will not solve the mystery on Day One. Resist the temptation to rush to the mishap scene. Although the Board will be itching with curiosity, its first response is not to scramble to the site.