iran warns us navy planes missiles starr dnt tsr_00003920.jpg
iran warns us navy planes missiles starr dnt tsr_00003920.jpg
Now playing
02:21
Iran threatens to shoot down US Navy planes
Now playing
01:48
The world's fastest plane
Two U.S. Air Force F-22 Raptors fly above Syria in support of Operation Inherent Resolve, Feb. 2, 2018. The F-22 is an air superiority fighter that incorporates the latest technological advances in reduced observables, avionics, engine performance and aerodynamic design. (U.S. Air National Guard photo by Staff Sgt. Colton Elliott)
U.S. Air National Guard/Staff Sgt. Colton Elliott
Two U.S. Air Force F-22 Raptors fly above Syria in support of Operation Inherent Resolve, Feb. 2, 2018. The F-22 is an air superiority fighter that incorporates the latest technological advances in reduced observables, avionics, engine performance and aerodynamic design. (U.S. Air National Guard photo by Staff Sgt. Colton Elliott)
Now playing
00:58
This plane flies 1,500 mph and costs $412M
Sgt. Sandra Welsh
Now playing
01:37
Over sixty years of US air power in one formation
US Navy
Now playing
01:35
Watch the US Navy's laser weapon in action
f 35 fighter jet thermal scan jnd orig vstan_00003326.jpg
Flir Systems Inc.
f 35 fighter jet thermal scan jnd orig vstan_00003326.jpg
Now playing
00:46
Thermal scan shows F-35 fighter jet in flight
Now playing
01:17
New rolling spy-bot can even swim upstream
Now playing
01:05
Navy's $3B stealth warship sets sail
Now playing
02:27
The U.S. military's $400B fighter jet (2016)
Now playing
00:51
Navy warship tested against 10,000-pound explosive
Now playing
00:59
Fighter pilot passes out, jet goes into free fall
Now playing
00:52
F-35 fighter jet fires 55 rounds per second
Now playing
01:23
U.S. Navy tests new warship
Now playing
01:07
New fighter jet to train top pilots
Now playing
01:09
The U.S. Air Force's high-speed stealth fighter
orig.f-22.raptor.refueling.isis_00001129.jpg
orig.f-22.raptor.refueling.isis_00001129.jpg
Now playing
01:09
See the stealth fighter that's bombing ISIS

Story highlights

An Iranian Revolutionary Guard Corps patrol boat trained its weapon on a Navy helicopter

It's hardly the first such scrape near the Strait of Hormuz

(CNN) —  

A US Navy Seahawk helicopter had what the Navy is calling an “unsafe and unprofessional encounter” with an Iranian Revolutionary Guard Corps patrol boat Saturday near the Strait of Hormuz.

The helicopter was flying overhead when the Iranians trained a weapon on it, according to a defense official. The Iranians did not fire. The event took place as the helicopter was escorting the aircraft carrier USS Dwight D. Eisenhower on its way out of the Persian Gulf.

Iranian ships regularly approach US Navy vessels in that area of the strait.

In August the USS Squall fired three warning shots into the water after boats belonging to Iran’s Revolutionary Guard Corps came within close proximity to American warships.

01:59 - Source: CNN
US Navy fires warning shots at Iranian vessel

The US military has expressed its concern regarding what it sees as Iran’s provocative naval actions in the gulf.

“If they continue to test us, we are going to respond, and we are going to protect ourselves and our partners,” Gen. Joseph Votel, commander of US Central Command, said at a Pentagon news conference in August following the incident with the Squall.

A US defense official told CNN in August that the number of these unsafe incidents had already surpassed the entire amount for 2015.

Votel, the senior US military commander in the Middle East, calculated that “about 90% of these unsafe, unprofessional activities” are by the IRGC navy and not Iran’s general navy.

“So this is, in my view, is not about the Iranian people,” Votel said. “It’s about the Iranian regime and their desire to continue to do these types of things that stoke instability or attempt to stoke instability in the region.”

The gulf and narrow Strait of Hormuz are considered key strategic bodies of water given the high volume of commercial oil that is shipped through them.

Iran’s chief of staff of the armed forces said Saturday that Tehran might establish naval bases in both Syria and Yemen, according to the semi-official Tasnim news organization.

In October, missiles were fired at the USS Mason off the coast of Yemen. The missiles originated from Houthi-controlled territory and the Houthi rebels are backed by Iran. That attack merited a retaliatory US airstrike against radar installations in the area.