Instrument Rating – Helicopter › II. Preflight Procedures › Task B. Helicopter Flight Instruments and Navigation Equipment

IH.II.B.K2b

Knowledge

Operation of the helicopter's applicable navigation system(s), including:

Area navigation (RNAV), global positioning system (GPS), Wide Area Augmentation System (WAAS), flight management system (FMS), autopilot

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Get a short, cited explanation of this element written from the FAA handbooks: the core idea, the numbers that matter, common test traps, and a quick self-check.

From the FAA library

14 CFR Part 91 — General Operating and Flight Rules Open
14 CFR Part 91, Special Federal Aviation Regulation No. 97—Special Operating Rules for the Conduct of Instrument Flight Rules (IFR) Area Navigation (RNAV) Operations using Global Positioning Systems
Part 91, Special Federal Aviation Regulation No. 97—Special Operating Rules for the Conduct of Instrument Flight Rules (IFR) Area Navigation (RNAV) Operations using Global Positioning Systems (GPS) in Alaska 54°00′00.00″ N., Long ... person may operate an aircraft under IFR during the en route portion of flight below the standard MEA or at the special MEA unless the operation is conducted in accordance with sections 3 and 4 of this SFAR. Section…
Aeronautical Information Manual p. 1-2-9
Chapter 1. Air Navigation › Section 2. Performance-Based Navigation (PBN) and Area Navigation (RNAV) › 1-2-3. Use of Suitable Area Navigation (RNAV) Systems on Conventional Procedures and Ro…
expiration date of the database, the operator must not use the database to conduct the operation. b. Types of RNAV Systems that Qualify as a Suitable RNAV System. When installed in accordance with appropriate airworthiness installation requirements and operated ... accordance with applicable operational guidance (for example, aircraft flight manual and Advisory Circular material), the following systems qualify as a suitable RNAV system: 1. An RNAV system with TSO-C129/ -C145/-C146 equipment, installed in accordance with…
Aeronautical Information Manual p. 1-2-1
Chapter 1. Air Navigation › Section 2. Performance-Based Navigation (PBN) and Area Navigation (RNAV) › 1-2-1. General
Section 2. Performance-Based Navigation (PBN) and Area Navigation (RNAV) Area Navigation (RNAV) 1-2-1. General a. Introduction to PBN. As air travel has evolved, methods of navigation have improved to give operators more flexibility. PBN exists under ... umbrella of area navigation (RNAV). The term RNAV in this context, as in procedure titles, just means “area navigation,” regardless of the equipment capability of the aircraft. (See FIG 1-2-1.) Many operators have upgraded their systems to obtain…
Instrument Flying Handbook p. 5-27
Chapter 5: Flight Instruments › Flight Management Systems (FMS) › Electronic Flight Instrument Systems
Electronic Flight Instrument Systems Modern technology has introduced into aviation a new method of displaying flight instruments, such as electronic flight instrument systems, integrated flight deck displays, and others. For the purpose of the practical test standards, any flight instrument ... display that utilizes LCD or picture tube like displays is referred to as “electronic flight instrument display” and/or a glass flight deck. In general aviation there is typically a primary flight display (PFD) and a multi-function display (MFD). Although…