1 U.S. Department of Transportation

15th July, 2015

Stephen Keen

geoResource Technologies, Inc.

41 Cameron Avenue

Cambridge, MA 02140

U.S. Department of Transportation

Docket Management System

1200 New Jersey Ave., SE

Washington DC 20590

Re: Amendment to Exemption Approval (Exemption No. 11677) Pursuant to Section 333 of the FAA Reform Act 

and Part 11 of the Federal Aviation Regulations

Dear Sir or Madam:

Pursuant to Section 333 of the FAA Modernization and Reform Act of 2012 (the “Reform Act”) and 14 CFR Part 

11, Stephen Keen, DBA ‘geoResource Technologies, Inc.’ operator of Unmanned Aircraft Systems (UAS), hereby 

requests an Amendment to Exemption No. 11677. This amendment is related wholly to the addition of one (1)

additional UAV platform, beyond the existing DJI S1000 already approved, and seeks no changes to the existing 

terms and conditions of the current exemption. Thank you in advance for your consideration.

Additional UAV Platform

The additional platform related to this Amendment request is the Steadidrone MAVRIK. The Steadidrone 

MAVRIK has previously been awarded several FAA 333 Exemptions. 

The Steadidrone MAVRIK is a multicopter with 4 or 8 motors. The UAV The aircraft can be flown manually or 

through the use of Mission Planner ground station software to develop flight plans for mapping missions (manual 

control can be re-asserted by the user at any time during autonomous flight). The Steadidrone MAVRIK utilizes a 

3DR Pixhawk flight controller. The platform specifications are described below:

o Dimensions (L x W x H) – 500 x 775 x 205 mm

o Airframe Weight – 1,300g

o Max Total Weight – 2,000g

o Flight Time - < 25 minutes

o Cruise Speed – 5 m/s

o Max Speed – 18 m/s
2 U.S. Department of Transportation

15th July, 2015

As with the original Section 333 Exemption application, the focus of the operation of the Steadidrone MAVRIK

related to this amendment is safety. That is the safe operation of the aircraft by following all the operational 

procedures listed in the original application (related to normal procedures, emergency procedures, pre-flight 

checklist, take-off checklist, post-flight checklist and the maintenance of flight and battery log books), the overriding principle being that if there is any doubt whatsoever related to the safety of the mission it will not be flown 

and steps will be taken to remedy any concerns before proceeding. This relates to; maintenance, platform hardware 

and software, environmental conditions (site and weather conditions), proximity of individuals not immediatelyrelated to flight operations and any safety concerns).

Included in this application for an Amendment are attachments related to configuration and operation of the various 

elements of the Steadidrone MAVRIK system. 

Included in this application for an Amendment is an attachment of the original Section 333 Exemption request by 

geoResource Technologies, Inc. - geoResourceTechnologiesInc-333.pdf.

Included in this application for an amendment is an attachment of the original FAA approval letter for Exemption 

No. 11677 (Regulatory Docket No. FAA–2015–0701) - geoResourceTechnologiesInc-11677.pdf.

Sincerely,

Stephen Keen, dba ‘geoResource Technologies, Inc.’