Entel HT644 Marine VHF Radio with Full Channel Set

The Entel HT644 Marine VHF Radio is centered on channel-plan breadth. It covers all INT, USA, and CAN marine channels across 156–163.275 MHz, making one handheld suitable for teams that move between several marine operating requirements. It provides a 5 W high setting and a low setting below 1 W, supported by a 2200 mAh intelligent Li-ion battery. Its IP68 rating is tied to immersion at 2 metres for 4 hours. Within this family, the practical distinction is that the HT644 supports broad day-to-day marine channel access, while the HT649 uses a defined, narrower channel set. The HT644 therefore fits managers who value operational channel flexibility over a radio dedicated to a more tightly bounded communications role.

How the Entel HT644 Marine VHF Radio Works in Practice

The radio supports simplex and semi duplex communication, 25 kHz channel spacing, and frequency stability of ±0.5ppm. For the communications team, that means the unit can be prepared around the channel plan used by the operation, while its scan function can automatically find an active channel instead of relying on continual manual stepping. Access to all INT, USA, and CAN marine channels reduces the need to hold different handheld models for different regional plans within a fleet or marine services company. The site communication procedure still determines channel assignment and call discipline; the radio gives the team a broad set of available channels from which to implement that procedure.

Audio and Shift Controls

The LCD shows channel names, a battery charge count, and RSSI, giving the user direct checks for channel identity, energy status, and received signal strength before a call. Audio is delivered through a 38 mm speaker with 1 W output, paired with an internal condenser microphone. The keylock can be set by the user or applied automatically, reducing accidental setting changes while personnel move around a vessel or dock. VOX operation is supported when the radio is paired with an Entel VOX audio accessory, so hands-free workflows should include that accessory in the equipment plan rather than assuming VOX is available on the handheld alone.

Saudi Marine-Sector Use Cases

The broad channel coverage suits port operations teams, marine service crews, tug operators, and maintenance personnel who move between vessels or facilities using different communication plans. At a marina or service zone, scanning can help locate an active channel, while the two power levels allow the operator to select an output aligned with the site’s procedure. Displayed channel names are particularly useful when radios pass between shifts, because the next user can confirm the assigned channel visually rather than relying on switch position or personal memory.

The IP68 rating and its associated immersion depth and duration make the HT644 relevant where spray is routine or a radio may be dropped into water. The operating range of -20°C to +55°C also gives project managers defined boundaries for reviewing site conditions before deployment. Those figures do not replace appropriate handling procedures, but they help identify work locations within the radio’s stated envelope and indicate when equipment should be moved to a controlled environment.

Choosing the HT644 within the Family

The HT644 and HT649 share the same IP68 rating, but they address different channel priorities. The HT644 covers all INT, USA, and CAN marine channels, while the HT649 carries a selected marine channel set. The HT644 is consequently the closer fit for operations teams that need to move between several channel plans; the HT649 suits a more narrowly defined marine communications assignment. The CLB750G is not an alternative handheld at all. It is a primary battery pack, so it should sit in the power-readiness part of the procurement plan rather than in a channel or user-interface comparison.

This separation helps purchasing managers compare like with like. If the deciding requirement is day-to-day channel flexibility, the HT644 is the relevant unit in this family. If the assignment calls for a limited channel set, the HT649 can be reviewed on that basis. When the request is for a compatible emergency power source, the CLB750G should be handled as a distinct battery item.

Deployment and Configuration Notes

Before issuing the radios, the communications team should define the required channel plan, choose user or automatic keylock behavior for the shift, and show operators how to read the channel name, RSSI, and battery charge count on the LCD. The helical antenna has 50 ohm impedance, a value to retain when assessing the antenna path or related equipment. The 1 W audio output and 38 mm speaker should be included in on-site acceptance testing at noisy work points instead of estimating audibility from the physical size of the handheld.

The 2200 mAh intelligent Li-ion battery lets the team include charge status in shift control through the screen’s battery count. A practical issue routine is to check battery state, confirm the assigned channel, verify lock behavior, and test scanning before the user goes to a vessel or quay. If the workflow calls for VOX, the compatible Entel audio accessory should appear in the same procurement order. The 156–163.275 MHz operating band and 25 kHz channel spacing should also be matched to the marine network configuration into which the radios will be introduced.

Package Contents

• HT644 radio
• Rechargeable Li-Ion battery pack
• Spring-loaded belt clip
• Intelligent charger pod
• Mains adapter
• 12V charger lead
• High-efficiency antenna
• Lanyard