ARGUS, WYVERN, and IS-BAO: Private Jet Safety Ratings Explained

01 / Industry Explainers

Part 135 is the floor, not the rating

Every charter operator you can legally book flies under FAA Part 135 (or the equivalent for the aircraft and route). That certificate covers pilot qualifications, maintenance programs, drug and alcohol testing, and operational limits set by the FAA. It is a real, enforced standard, and an operator without it should not be flying paying passengers at all.

But Part 135 is a licensing floor, not a performance score. The FAA certifies that an operator meets the minimum rules to operate; it does not rank operators against each other, publish a safety grade, or re-audit a company's culture every year. Two Part 135 operators can both be fully legal and still have very different safety records, training depth, and internal oversight. That is the space ARGUS, WYVERN, and IS-BAO were built to fill: independent, third-party audits layered on top of the legal minimum.

02 / Industry Explainers

ARGUS: four tiers built on deeper data each time

ARGUS International is the most widely cited safety-rating firm in charter aviation. It reviews an operator's safety history, insurance, pilot records, and operational data, and assigns one of four ratings. Each tier requires more information and, at the top two levels, an actual on-site visit.

The four ARGUS ratings

• ARGUS Rated: The entry-level rating. Based on a review of the operator's safety record, insurance coverage, and basic operational data. No on-site audit is required at this level.
• ARGUS Gold: Adds a deeper review of the operator's operational history and pilot records, plus ongoing monitoring. Still a desktop-level review rather than a physical inspection.
• ARGUS Gold Plus: The operator has passed the same on-site audit required for Platinum, but does not yet meet the operating-history requirement (commonly two years under current management) needed for the Platinum designation itself.
• ARGUS Platinum: The highest rating. Requires an on-site audit of the operator's safety management system, training program, maintenance tracking, and operational control, along with the minimum operating-history requirement. It is the closest thing ARGUS offers to a full safety-culture review, not just a paperwork check.

The practical read: ARGUS Platinum vs Gold comes down to whether an auditor has actually visited the operator and reviewed its systems in person (Platinum and Gold Plus) versus a record and data review from a distance (Rated and Gold).

03 / Industry Explainers

WYVERN: Registered vs Wingman

WYVERN takes a similar two-tier approach with different names and a different audit structure.

• WYVERN Registered is based on operator-submitted data: certificates, insurance, safety history, and basic policy documentation. It confirms the operator meets a baseline standard but does not include an on-site visit.
• WYVERN Wingman requires an on-site audit against WYVERN's own standard, which reviews pilot training and experience minimums, drug and alcohol testing compliance, maintenance practices, and the operator's safety management system. Wingman also has a recurrent element: operators are re-audited on a set cycle rather than certified once and left alone.

WYVERN also runs trip-specific pilot and aircraft vetting products (Pilot PRO/PASS) used mainly by brokers and flight departments before a specific charter, which is a narrower, per-flight check rather than an operator-wide rating.

04 / Industry Explainers

IS-BAO: a process standard, not a pass/fail badge

IS-BAO (International Standard for Business Aircraft Operations) is different in kind from ARGUS and WYVERN. It was developed by the International Business Aviation Council (IBAC) and is built around ICAO's safety management system (SMS) framework. Rather than scoring an operator against a fixed checklist, it certifies how mature the operator's own safety management process is, and it does so in stages.

IS-BAO Stages I through III

1. 01Stage I: The operator has documented and implemented a foundational SMS: policies, hazard reporting, and basic risk management are in place.
2. 02Stage II: The SMS has been operating in practice for a meaningful period (typically at least 12 months), with evidence it is actually being used to manage risk, not just written down.
3. 03Stage III: The SMS is fully integrated into daily operations, with continuous improvement and performance benchmarking built into how the company runs.

IS-BAO registration is renewed through periodic audits, generally every two years, so it is meant to reflect an ongoing process rather than a one-time achievement.

05 / Industry Explainers

Reading the three programs together

None of these programs measures exactly the same thing, which is why operators often carry more than one.

An operator holding ARGUS Platinum, WYVERN Wingman, and IS-BAO Stage II or III together has been reviewed from three different angles: independent record verification, an on-site operational audit, and evidence of an internal safety process that is actually working, not just documented.

06 / Industry Explainers

How this differs from a Google review

A five-star average on Google or a review site reflects passenger experience: was the crew friendly, was the cabin clean, did the flight leave on time. That matters, but it is not a safety audit. Reviewers are not trained to evaluate an operator's maintenance tracking, pilot duty-time compliance, or safety management system, and a review says nothing about whether an operator has ever been independently inspected.

ARGUS, WYVERN, and IS-BAO are the reverse: they say almost nothing about whether the flight attendant was pleasant, but they are conducted by people trained specifically to evaluate operational safety. Reading both together, verified customer reviews for the flying experience and third-party audit status for the operational side, gives a more complete picture than either alone.

07 / Industry Explainers

How to actually use these ratings when booking

1. 01Confirm the operator holds a current Part 135 certificate for the aircraft type you are booking. This is non-negotiable and is the baseline every legal charter flight sits on.
2. 02Check which third-party ratings the operator currently holds, not just historically. ARGUS and WYVERN ratings can lapse or be suspended, and IS-BAO registration requires renewal.
3. 03Note the tier, not just the name. ARGUS Rated and ARGUS Platinum both say "ARGUS," but only one includes an on-site audit.
4. 04Cross-reference with verified reviews from passengers who actually flew with the operator, not just the operator's own marketing claims.
5. 05If you are booking through a broker, ask which operator will actually fly the trip and check that operator's ratings directly. Broker credentials do not substitute for the operating carrier's own safety record.

Sites and brokers sometimes cite ratings loosely, so it is worth confirming directly with ARGUS, WYVERN, or IBAC (for IS-BAO) if a specific rating is central to your decision, especially for a high-value or long trip.

08 / Industry Explainers

Frequently asked questions

What is an ARGUS Platinum rating?

What is WYVERN Wingman?

Do all charter operators have safety ratings?

Is a charter operator safe if it has no third-party rating?

ARGUS Platinum vs Gold, which matters more?

09 / Industry Explainers

Compare operators by safety record, not just star rating

The Bravo register lists charter operators alongside their current third-party safety ratings and verified passenger reviews, so you can weigh both before you book. Browse charter operators to compare, or request quotes for your route once you know what you are looking for.