Speedboat Key

Speedboat Keys are recurring intel items in the Hitman franchise, featuring in both HITMAN™ and HITMAN™ 2.

Obtaining one during a mission will open up an exit once all mission objectives have been fulfilled.

Description[]

"A key for a fast motorboat. Possible exfiltration route. Matches the make of the watercraft located at the rear of the palace."

― In-game Description, Paris

"A key for what is sure to be a very beautiful speed boat."

― In-game Description, Miami

"Key to an expensive speedboat. Could be one of those moored behind Delgado's mansion."

― In-game Description, Santa Fortuna

"A key to a speedboat. There's one docked at the Villa Pier."

― In-game Description, Haven Island

HITMAN™

The Showstopper - Found inside the Museum Owner's Study, on the second floor of the palace.
Club 27 - When playing on Master difficulty, the speedboat key is located in suite 208 on a table in the bedroom. It must be obtained to escape via the boat, unlike easier difficulty levels. The very end of the pier itself is off-limits to non-staff, but the player can simply rush past the guards.

HITMAN™ 2

The Finish Line / A Silver Tongue - Found inside the boat rental building at the Marina Park.
Three-Headed Serpent / Embrace Of The Serpent - Found inside Catalina's room at the Delgado Mansion.
The Last Resort - Found inside the Home Theater at the Villa.

HITMAN™

HITMAN™ 2

The Finish Line / A Silver Tongue - At the Marina, directly next to the Marina starting location.
Three-Headed Serpent / Embrace Of The Serpent - At the Dock, behind the Delgado Mansion.
The Last Resort - At the Villa Pier.

The black and red ball attached to the key is a floating keychain, they're used with real life boat keys as to prevent a boat's keys from sinking underwater in the event that they're accidentally dropped.
There are many other boat-related exits in HITMAN™ and HITMAN™ 2 that are not listed above, but they do not require the acquisition of a key to be unlocked.